toolkit/components/telemetry/Histograms.json
author Jan Henning <jh+bugzilla@buttercookie.de>
Wed, 08 Mar 2017 20:17:06 +0100
changeset 395328 b25235239f9ba35586466aee8b8d2f49068ee550
parent 395262 ede05196d436e933a9224c3b3ca1822a3f82265b
child 395605 a6ce0161200ca5499e078d48f2321a539a2aa2c0
permissions -rw-r--r--
Bug 1345460 - Implement FX_SANITIZE telemetry on Android. r=liuche a=lizzard To gauge the impact of bug 1343995 on perceived shutdown times, we want to measure how long sanitising actually takes in practice on Android. MozReview-Commit-ID: 3gSfT8IoO70


{
  "A11Y_INSTANTIATED_FLAG": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "has accessibility support been instantiated"
  },
  "A11Y_CONSUMERS": {
    "expires_in_version": "default",
    "kind": "enumerated",
    "n_values": 11,
    "description": "Accessibility client by enum id"
  },
  "A11Y_ISIMPLEDOM_USAGE_FLAG": {
    "expires_in_version": "default",
    "kind": "flag",
    "description": "have the ISimpleDOM* accessibility interfaces been used"
  },
  "A11Y_IATABLE_USAGE_FLAG": {
    "expires_in_version": "default",
    "kind": "flag",
    "description": "has the IAccessibleTable accessibility interface been used"
  },
  "A11Y_UPDATE_TIME": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "time spent updating accessibility (ms)"
  },
  "ADDON_CONTENT_POLICY_SHIM_BLOCKING_LOADING_MS": {
    "expires_in_version": "58",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 20,
    "keyed": true,
    "description": "The amount of time the content process blocked processing shouldLoad shims for an add-on (keyed by add-on ID) prior to the load event, for each document load.",
    "bug_numbers": [1331684],
    "alert_emails": ["kmaglione@mozilla.com"]
  },
  "ADDON_CONTENT_POLICY_SHIM_BLOCKING_LOADED_MS": {
    "expires_in_version": "58",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 20,
    "keyed": true,
    "description": "The amount of time the content process blocked processing shouldLoad shims for an add-on (keyed by add-on ID) after the load event, for each document load.",
    "bug_numbers": [1331684],
    "alert_emails": ["kmaglione@mozilla.com"]
  },
  "ADDON_MANAGER_UPGRADE_UI_SHOWN": {
    "expires_in_version": "53",
    "kind": "count",
    "description": "Recorded when the addon manager shows the modal upgrade UI. Should only be recorded once per upgrade.",
    "releaseChannelCollection": "opt-out",
    "bug_numbers": [1268548],
    "alert_emails": ["kev@mozilla.com"]
  },
  "ADDON_SHIM_USAGE": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 15,
    "keyed": true,
    "description": "Reasons why add-on shims were used, keyed by add-on ID."
  },
  "ADDON_FORBIDDEN_CPOW_USAGE": {
    "expires_in_version": "never",
    "kind": "count",
    "keyed": true,
    "description": "Counts the number of times a given add-on used CPOWs when it was marked as e10s compatible.",
    "bug_numbers": [1214824],
    "alert_emails": ["wmccloskey@mozilla.com"]
  },
  "BROWSER_SHIM_USAGE_BLOCKED": {
    "expires_in_version": "never",
    "kind": "count",
    "description": "Counts the number of times a CPOW shim was blocked from being created by browser code.",
    "releaseChannelCollection": "opt-out",
    "bug_numbers": [1245901],
    "alert_emails": ["benjamin@smedbergs.us"]
  },
  "APPLICATION_REPUTATION_SHOULD_BLOCK": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Overall (local or remote) application reputation verdict (shouldBlock=false is OK)."
  },
  "APPLICATION_REPUTATION_LOCAL": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 3,
    "description": "Application reputation local results (0=ALLOW, 1=BLOCK, 2=NONE)"
  },
  "APPLICATION_REPUTATION_SERVER": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 3,
    "description": "Status of the application reputation remote lookup (0=OK, 1=failed, 2=invalid protobuf response)"
  },
  "APPLICATION_REPUTATION_SERVER_VERDICT": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "56",
    "releaseChannelCollection": "opt-out",
    "bug_numbers": [1272788],
    "kind": "enumerated",
    "n_values": 8,
    "description": "Application reputation remote verdict (0=SAFE, 1=DANGEROUS, 2=UNCOMMON, 3=POTENTIALLY_UNWANTED, 4=DANGEROUS_HOST, 5=UNKNOWN)"
  },
  "APPLICATION_REPUTATION_COUNT": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Application reputation query count (both local and remote)"
  },
  "APPLICATION_REPUTATION_REMOTE_LOOKUP_TIMEOUT": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "56",
    "kind": "boolean",
    "bug_numbers": [1172689],
    "description": "Recorded when application reputation remote lookup is performed, `true` is recorded if the lookup times out."
  },
  "APPLICATION_REPUTATION_BLOCKLIST_MATCH": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "60",
    "kind": "enumerated",
    "n_values": 4,
    "bug_numbers": [1331139],
    "description": "For each Application Reputation lookup against both the V2 and V4 Google lists, note which version of block list returned a match (0 = no match, 1 = match only V2, 2 = match only V4, 3 = match both V2 and V4)"
  },
  "APPLICATION_REPUTATION_ALLOWLIST_MATCH": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "60",
    "kind": "enumerated",
    "n_values": 4,
    "bug_numbers": [1331139],
    "description": "For each Application Reputation lookup against both the V2 and V4 Google lists, note which version of the allow list returned a match (0 = no match, 1 = match only V2, 2 = match only V4, 3 = match both V2 and V4)"
  },
  "AUDIOSTREAM_FIRST_OPEN_MS": {
    "expires_in_version": "50",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "The length of time (in milliseconds) for the first open of AudioStream."
  },
  "AUDIOSTREAM_LATER_OPEN_MS": {
    "expires_in_version": "50",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "The length of time (in milliseconds) for the subsequent opens of AudioStream."
  },
  "AUDIOSTREAM_BACKEND_USED": {
    "alert_emails": ["padenot@mozilla.com", "kinetik@flim.org"],
    "bug_numbers": [1280630],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 16,
    "description": "The operating system audio back-end used when successfully opening an audio stream, or whether the failure occurred on the first try or not <https://dxr.mozilla.org/mozilla-central/search?q=AUDIOSTREAM_BACKEND_ID_STR>",
    "releaseChannelCollection": "opt-out"
  },
  "AUSHELPER_CPU_ERROR_CODE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1296630],
    "expires_in_version": "60",
    "kind": "enumerated",
    "n_values": 16,
    "releaseChannelCollection": "opt-out",
    "description": "The error code from the aushelper system add-on when querying the registry for CPU information for bug 1296630 (see browser/extensions/aushelper/bootstrap.js)."
  },
  "AUSHELPER_CPU_RESULT_CODE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1296630],
    "expires_in_version": "60",
    "kind": "enumerated",
    "n_values": 5,
    "releaseChannelCollection": "opt-out",
    "description": "Whether the system is affected by bug 1296630 (1=No, 2=Yes, 3=Error, and 4=Unknown)."
  },
  "AUSHELPER_WEBSENSE_ERROR_CODE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1305847],
    "expires_in_version": "60",
    "kind": "enumerated",
    "n_values": 8,
    "releaseChannelCollection": "opt-out",
    "description": "The error code from the aushelper system add-on when gathering information on Websense (see browser/extensions/aushelper/bootstrap.js)."
  },
  "AUSHELPER_WEBSENSE_REG_EXISTS": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1305847],
    "expires_in_version": "60",
    "kind": "boolean",
    "releaseChannelCollection": "opt-out",
    "description": "Whether the system has a Websense InstallVersion registry value (see browser/extensions/aushelper/bootstrap.js)."
  },
  "BACKGROUNDFILESAVER_THREAD_COUNT": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 21,
    "description": "Maximum number of concurrent threads reached during a given download session"
  },
  "BLOCKLIST_SYNC_FILE_LOAD": {
    "alert_emails": ["rvitillo@mozilla.com"],
    "expires_in_version": "35",
    "kind": "boolean",
    "description": "blocklist.xml has been loaded synchronously *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "CHECKERBOARD_DURATION": {
    "alert_emails": ["kgupta@mozilla.com"],
    "bug_numbers": [1238040],
    "expires_in_version": "55",
    "kind": "exponential",
    "high": 100000,
    "n_buckets": 50,
    "description": "Duration of a checkerboard event in milliseconds"
  },
  "CHECKERBOARD_PEAK": {
    "alert_emails": ["kgupta@mozilla.com"],
    "bug_numbers": [1238040],
    "expires_in_version": "55",
    "kind": "exponential",
    "high": 66355200,
    "n_buckets": 50,
    "description": "Peak number of CSS pixels checkerboarded during a checkerboard event (the high value is the size of a 4k display with max APZ zooming)"
  },
  "CHECKERBOARD_POTENTIAL_DURATION": {
    "alert_emails": ["kgupta@mozilla.com"],
    "bug_numbers": [1238040],
    "expires_in_version": "55",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "Duration of a chunk of time (in ms) that could reasonably have had checkerboarding"
  },
  "CHECKERBOARD_SEVERITY": {
    "alert_emails": ["kgupta@mozilla.com"],
    "bug_numbers": [1238040],
    "expires_in_version": "55",
    "kind": "exponential",
    "high": 1073741824,
    "n_buckets": 50,
    "description": "Opaque measure of the severity of a checkerboard event"
  },
  "COMPOSITE_TIME" : {
    "expires_in_version": "never",
    "description": "Composite times in milliseconds",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50
  },
  "COMPOSITE_FRAME_ROUNDTRIP_TIME" : {
    "expires_in_version": "never",
    "description": "Time from vsync to finishing a composite in milliseconds.",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50
  },
  "COMPOSITOR_ANIMATION_DURATION" : {
    "expires_in_version": "58",
    "description": "Duration of animations running on the compositor in milliseconds",
    "kind": "exponential",
    "high": 20000,
    "n_buckets": 50,
    "alert_emails": ["kgupta@mozilla.com"],
    "bug_numbers": [1339220]
  },
  "COMPOSITOR_ANIMATION_MAX_LAYER_AREA" : {
    "expires_in_version": "58",
    "description": "High-watermark of layer area affected during a compositor animation. Units are layer pixels squared.",
    "kind": "exponential",
    "high": 8294400,
    "n_buckets": 50,
    "alert_emails": ["kgupta@mozilla.com"],
    "bug_numbers": [1339220]
  },
  "CONTENT_PROCESS_LAUNCH_TIME_MS" : {
    "alert_emails": ["bsmedberg@mozilla.com", "mconley@mozilla.com"],
    "expires_in_version": "57",
    "bug_numbers": [1304790],
    "kind": "exponential",
    "high": 64000,
    "n_buckets": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Content process launch time until the GetXPCOMProcessAttributes message is received, in milliseconds"
  },
  "CONTENT_RESPONSE_DURATION" : {
    "alert_emails": ["kgupta@mozilla.com"],
    "bug_numbers": [1261373],
    "expires_in_version": "55",
    "description": "Main thread response times for APZ notifications about input events (ms)",
    "kind" : "exponential",
    "high": 60000,
    "n_buckets": 50
  },
  "CREATE_EVENT_BEFOREUNLOADEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"beforeunloadevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_COMMANDEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"commandevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_COMMANDEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"commandevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_COMPOSITIONEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"compositionevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_CUSTOMEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"customevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_DATACONTAINEREVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"datacontainerevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_DATACONTAINEREVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"datacontainerevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_DEVICEMOTIONEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"devicemotionevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_DEVICEORIENTATIONEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"deviceorientationevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_DRAGEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"dragevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_DRAGEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"dragevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_ERROREVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"errorevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198, 1333901]
  },
  "CREATE_EVENT_EVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"event\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_EVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"events\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_HASHCHANGEEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"hashchangeevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_HTMLEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"htmlevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_KEYBOARDEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"keyboardevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_KEYEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"keyevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_MESSAGEEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"messageevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_MOUSEEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"mouseevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_MOUSEEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"mouseevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_MOUSESCROLLEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"mousescrollevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_MUTATIONEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"mutationevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_MUTATIONEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"mutationevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_NOTIFYPAINTEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"notifypaintevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_PAGETRANSITION" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"pagetransition\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_POPSTATEEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"popstateevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_POPUPEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"popupevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_SCROLLAREAEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"scrollareaevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_SIMPLEGESTUREEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"simplegestureevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_STORAGEEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"storageevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_SVGEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"svgevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_SVGEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"svgevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_SVGZOOMEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"svgzoomevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_SVGZOOMEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"svgzoomevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_TEXTEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"textevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_TEXTEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"textevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_TIMEEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"timeevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_TIMEEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"timeevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_TOUCHEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"touchevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_UIEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"uievent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_UIEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"uievents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_XULCOMMANDEVENT" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"xulcommandevent\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CREATE_EVENT_XULCOMMANDEVENTS" : {
    "alert_emails": ["ayg@aryeh.name"],
    "description": "Was document.createEvent(\"xulcommandevents\") ever called",
    "expires_in_version": "56",
    "kind": "count",
    "bug_numbers": [1295588, 1251198]
  },
  "CYCLE_COLLECTOR": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent on one cycle collection (ms)"
  },
  "CYCLE_COLLECTOR_WORKER": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent on one cycle collection in a worker (ms)"
  },
  "CYCLE_COLLECTOR_FULL": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Full pause time for one cycle collection, including preparation (ms)"
  },
  "CYCLE_COLLECTOR_MAX_PAUSE": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Longest pause for an individual slice of one cycle collection, including preparation (ms)"
  },
  "CYCLE_COLLECTOR_FINISH_IGC": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Cycle collection finished an incremental GC"
  },
  "CYCLE_COLLECTOR_SYNC_SKIPPABLE": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Cycle collection synchronously ran forget skippable"
  },
  "CYCLE_COLLECTOR_VISITED_REF_COUNTED": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 300000,
    "n_buckets": 50,
    "description": "Number of ref counted objects visited by the cycle collector"
  },
  "CYCLE_COLLECTOR_WORKER_VISITED_REF_COUNTED": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 300000,
    "n_buckets": 50,
    "description": "Number of ref counted objects visited by the cycle collector in a worker"
  },
  "CYCLE_COLLECTOR_VISITED_GCED": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 300000,
    "n_buckets": 50,
    "description": "Number of JS objects visited by the cycle collector"
  },
  "CYCLE_COLLECTOR_WORKER_VISITED_GCED": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 300000,
    "n_buckets": 50,
    "description": "Number of JS objects visited by the cycle collector in a worker"
  },
  "CYCLE_COLLECTOR_COLLECTED": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 100000,
    "n_buckets": 50,
    "description": "Number of objects collected by the cycle collector"
  },
  "CYCLE_COLLECTOR_WORKER_COLLECTED": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 100000,
    "n_buckets": 50,
    "description": "Number of objects collected by the cycle collector in a worker"
  },
  "CYCLE_COLLECTOR_NEED_GC": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Needed garbage collection before cycle collection."
  },
  "CYCLE_COLLECTOR_WORKER_NEED_GC": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Needed garbage collection before cycle collection in a worker."
  },
  "CYCLE_COLLECTOR_TIME_BETWEEN": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 120,
    "n_buckets": 50,
    "description": "Time spent in between cycle collections (seconds)"
  },
  "CYCLE_COLLECTOR_OOM": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Set if the cycle collector ran out of memory at some point"
  },
  "CYCLE_COLLECTOR_WORKER_OOM": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Set if the cycle collector in a worker ran out of memory at some point"
  },
  "CYCLE_COLLECTOR_ASYNC_SNOW_WHITE_FREEING": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent on one asynchronous SnowWhite freeing (ms)"
  },
  "DEFERRED_FINALIZE_ASYNC": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Pause time for asynchronous deferred finalization (ms)"
  },
  "DEVICE_RESET_REASON": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 10,
    "description": "GPU Device Reset Reason (ok, hung, removed, reset, internal error, invalid call, out of memory)"
  },
  "FAMILY_SAFETY": {
    "alert_emails": ["seceng@mozilla.org"],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 16,
    "bug_numbers": [1239166],
    "description": "Status of Family Safety detection and remediation. See nsNSSComponent.cpp."
  },
  "FETCH_IS_MAINTHREAD": {
    "expires_in_version": "50",
    "kind": "boolean",
    "description": "Was Fetch request initiated from the main thread?"
  },
  "FORCED_DEVICE_RESET_REASON": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 50,
    "releaseChannelCollection": "opt-out",
    "description": "GPU Forced Device Reset Reason (OpenSharedHandle)"
  },
  "FORGET_SKIPPABLE_MAX": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Max time spent on one forget skippable (ms)"
  },
  "FULLSCREEN_TRANSITION_BLACK_MS": {
    "alert_emails": ["xquan@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 100,
    "high": 5000,
    "n_buckets": 50,
    "bug_numbers": [1271160],
    "description": "The time spent in the fully-black screen in fullscreen transition"
  },
  "FULLSCREEN_CHANGE_MS": {
    "alert_emails": ["xquan@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 100,
    "high": 5000,
    "n_buckets": 50,
    "bug_numbers": [1271160],
    "description": "The time content uses to enter/exit fullscreen regardless of fullscreen transition timeout"
  },
  "GC_REASON_2": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "description": "Reason (enum value) for initiating a GC"
  },
  "GC_IS_COMPARTMENTAL": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Is it a zone GC?"
  },
  "GC_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent running JS GC (ms)"
  },
  "GC_BUDGET_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 10,
    "description": "Requested GC slice budget (ms)"
  },
  "GC_ANIMATION_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent running JS GC when animating (ms)"
  },
  "GC_MAX_PAUSE_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 1000,
    "n_buckets": 50,
    "description": "Longest GC slice in a GC (ms)"
  },
  "GC_MARK_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent running JS GC mark phase (ms)"
  },
  "GC_SWEEP_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent running JS GC sweep phase (ms)"
  },
  "GC_COMPACT_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent running JS GC compact phase (ms)"
  },
  "GC_MARK_ROOTS_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 200,
    "n_buckets": 50,
    "description": "Time spent marking GC roots (ms)"
  },
  "GC_MARK_GRAY_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 200,
    "n_buckets": 50,
    "description": "Time spent marking gray GC objects (ms)"
  },
  "GC_SLICE_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent running a JS GC slice (ms)"
  },
  "GC_SLOW_PHASE": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 75,
    "description": "The longest phase in any slice that goes over 2x the budget"
  },
  "GC_MMU_50": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 20,
    "description": "Minimum percentage of time spent outside GC over any 50ms window"
  },
  "GC_RESET": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Was an incremental GC canceled?"
  },
  "GC_RESET_REASON": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "description": "Reason for cancelling an ongoing GC (see js::gc::AbortReason)",
    "bug_numbers": [1308116]
  },
  "GC_INCREMENTAL_DISABLED": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Is incremental GC permanently disabled?"
  },
  "GC_NON_INCREMENTAL": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Was the GC non-incremental?"
  },
  "GC_NON_INCREMENTAL_REASON": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "description": "Reason for performing a non-incremental GC (see js::gc::AbortReason)",
    "bug_numbers": [1308116]
  },
  "GC_SCC_SWEEP_TOTAL_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 500,
    "n_buckets": 50,
    "description": "Time spent sweeping compartment SCCs (ms)"
  },
  "GC_SCC_SWEEP_MAX_PAUSE_MS": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 500,
    "n_buckets": 50,
    "description": "Time spent sweeping slowest compartment SCC (ms)"
  },
  "GC_MINOR_REASON": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "description": "Reason (enum value) for initiating a minor GC"
  },
  "GC_MINOR_REASON_LONG": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "description": "Reason (enum value) that caused a long (>1ms) minor GC"
  },
  "GC_MINOR_US": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 100,
    "description": "Time spent running JS minor GC (us)"
  },
  "GC_NURSERY_BYTES": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 16777216,
    "n_buckets": 16,
    "bug_numbers": [1259347],
    "description": "Size of the GC nursery (bytes)"
  },
  "GC_PRETENURE_COUNT": {
    "alert_emails": ["dev-telemetry-gc-alerts@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "kind": "enumerated",
    "n_values": 32,
    "bug_numbers": [1293262],
    "description": "How many objects groups were selected for pretenuring by a minor GC"
  },
  "GEOLOCATION_ACCURACY_EXPONENTIAL": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 100000,
    "n_buckets": 50,
    "description": "Location accuracy"
  },
  "GEOLOCATION_ERROR": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Has seen location error"
  },
  "GEOLOCATION_GETCURRENTPOSITION_SECURE_ORIGIN" : {
    "expires_in_version" : "55",
    "kind": "enumerated",
    "n_values": 10,
    "bug_numbers": [1230209],
    "description" : "Number of navigator.geolocation.getCurrentPosition() calls (0=other, 1=http, 2=https)"
  },
  "GEOLOCATION_REQUEST_GRANTED": {
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 20,
    "bug_numbers": [1230209],
    "description": "Geolocation requests either granted or denied (0=denied/other, 1=denied/http, 2=denied/https, ..., 10=granted/other, 11=granted/http, 12=granted/https)"
  },
  "GEOLOCATION_WATCHPOSITION_SECURE_ORIGIN" : {
    "expires_in_version" : "55",
    "kind": "enumerated",
    "n_values": 10,
    "bug_numbers": [1230209],
    "description" : "Number of navigator.geolocation.watchPosition() calls (0=other, 1=http, 2=https)"
  },
  "GEOLOCATION_WIN8_SOURCE_IS_MLS": {
    "expires_in_version": "default",
    "kind": "boolean",
    "description": "Geolocation on Win8 is either MLS or native"
  },
  "GEOLOCATION_OSX_SOURCE_IS_MLS": {
    "expires_in_version": "default",
    "kind": "boolean",
    "description": "Geolocation on OS X is either MLS or CoreLocation"
  },
  "GEOLOCATION_GETCURRENTPOSITION_VISIBLE": {
    "alert_emails": ["michelangelo@mozilla.com"],
    "expires_in_version": "55",
    "kind": "boolean",
    "bug_numbers": [1255198],
    "description": "This metric is recorded every time a navigator.geolocation.getCurrentPosition() request gets allowed/fulfilled. A false value is recorded if the owner is not visible according to document.isVisible."
  },
  "GEOLOCATION_WATCHPOSITION_VISIBLE": {
    "alert_emails": ["michelangelo@mozilla.com"],
    "expires_in_version": "55",
    "kind": "boolean",
    "bug_numbers": [1255198],
    "description": "This metric is recorded every time a navigator.geolocation.watchPosition() request gets allowed/fulfilled. A false value is recorded if the owner is not visible according to document.isVisible."
  },
  "GPU_PROCESS_LAUNCH_TIME_MS_2" : {
    "alert_emails": ["danderson@mozilla.com"],
    "expires_in_version": "never",
    "bug_numbers": [1297790, 1317796],
    "kind": "exponential",
    "high": 64000,
    "n_buckets": 100,
    "releaseChannelCollection": "opt-out",
    "description": "GPU process launch time in milliseconds"
  },
  "GPU_PROCESS_INITIALIZATION_TIME_MS" : {
    "alert_emails": ["danderson@mozilla.com"],
    "expires_in_version": "never",
    "bug_numbers": [1324095],
    "kind": "exponential",
    "high": 64000,
    "n_buckets": 100,
    "releaseChannelCollection": "opt-out",
    "description": "GPU process initialization (excluding XPCOM and fork time) time in milliseconds"
  },
  "JS_DEPRECATED_LANGUAGE_EXTENSIONS_IN_CONTENT": {
    "alert_emails": ["jdemooij@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 10,
    "description": "Use of SpiderMonkey's deprecated language extensions in web content: ForEach=0, DestructuringForIn=1 (obsolete), LegacyGenerator=2, ExpressionClosure=3, LetBlock=4 (obsolete), LetExpression=5 (obsolete), NoSuchMethod=6 (obsolete), FlagsArgument=7 (obsolete), RegExpSourceProp=8 (obsolete), RestoredRegExpStatics=9 (obsolete), BlockScopeFunRedecl=10"
  },
  "JS_DEPRECATED_LANGUAGE_EXTENSIONS_IN_ADDONS": {
    "alert_emails": ["jdemooij@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 10,
    "description": "Use of SpiderMonkey's deprecated language extensions in add-ons: ForEach=0, DestructuringForIn=1 (obsolete), LegacyGenerator=2, ExpressionClosure=3, LetBlock=4 (obsolete), LetExpression=5 (obsolete), NoSuchMethod=6 (obsolete), FlagsArgument=7 (obsolete), RegExpSourceProp=8 (obsolete), RestoredRegExpStatics=9 (obsolete), BlockScopeFunRedecl=10"
  },
  "XUL_CACHE_DISABLED": {
    "expires_in_version": "default",
    "kind": "flag",
    "description": "XUL cache was disabled"
  },
  "MEMORY_RESIDENT_FAST": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 32768,
    "high": 16777216,
    "n_buckets": 100,
    "bug_numbers": [1226196],
    "description": "Resident memory size (KB)"
  },
  "MEMORY_TOTAL": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1198209],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 32768,
    "high": 16777216,
    "n_buckets": 100,
    "description": "Total Memory Across All Processes (KB)"
  },
  "MEMORY_UNIQUE": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1198209],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 32768,
    "high": 16777216,
    "n_buckets": 100,
    "description": "Unique Set Size (KB)"
  },
  "MEMORY_VSIZE": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 32768,
    "high": 16777216,
    "n_buckets": 100,
    "description": "Virtual memory size (KB)"
  },
  "MEMORY_VSIZE_MAX_CONTIGUOUS": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 32768,
    "high": 16777216,
    "n_buckets": 100,
    "description": "Maximum-sized block of contiguous virtual memory (KB)"
  },
  "MEMORY_JS_COMPARTMENTS_SYSTEM": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50,
    "description": "Total JavaScript compartments used for add-ons and internals."
  },
  "MEMORY_JS_COMPARTMENTS_USER": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50,
    "description": "Total JavaScript compartments used for web pages"
  },
  "MEMORY_JS_GC_HEAP": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1024,
    "high": 16777216,
    "n_buckets": 200,
    "description": "Memory used by the garbage-collected JavaScript heap (KB)"
  },
  "MEMORY_STORAGE_SQLITE": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1024,
    "high": 524288,
    "n_buckets": 50,
    "description": "Memory used by SQLite (KB)"
  },
  "MEMORY_IMAGES_CONTENT_USED_UNCOMPRESSED": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1024,
    "high": 1048576,
    "n_buckets": 50,
    "description": "Memory used for uncompressed, in-use content images (KB)"
  },
  "MEMORY_HEAP_ALLOCATED": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1024,
    "high": 16777216,
    "n_buckets": 200,
    "description": "Heap memory allocated (KB)"
  },
  "MEMORY_HEAP_COMMITTED_UNUSED": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1024,
    "high": 524288,
    "n_buckets": 50,
    "description": "Committed, unused heap memory (KB)"
  },
  "MEMORY_HEAP_OVERHEAD_FRACTION": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1252375],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 25,
    "description": "Fraction of committed heap memory that is overhead (percentage)."
  },
  "GHOST_WINDOWS": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 128,
    "n_buckets": 32,
    "description": "Number of ghost windows"
  },
  "MEMORY_FREE_PURGED_PAGES_MS": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1024,
    "n_buckets": 10,
    "description": "Time(ms) to purge dirty heap pages."
  },
  "LOW_MEMORY_EVENTS_VIRTUAL": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1024,
    "n_buckets": 21,
    "description": "Number of low-virtual-memory events fired since last ping",
    "cpp_guard": "XP_WIN"
  },
  "LOW_MEMORY_EVENTS_PHYSICAL": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1024,
    "n_buckets": 21,
    "description": "Number of low-physical-memory events fired since last ping",
    "cpp_guard": "XP_WIN"
  },
  "LOW_MEMORY_EVENTS_COMMIT_SPACE": {
    "alert_emails": ["memshrink-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1024,
    "n_buckets": 21,
    "description": "Number of low-commit-space events fired since last ping",
    "cpp_guard": "XP_WIN"
  },
  "PAGE_FAULTS_HARD": {
    "expires_in_version": "default",
    "kind": "exponential",
    "low": 8,
    "high": 65536,
    "n_buckets": 13,
    "description": "Hard page faults (since last telemetry ping)",
    "cpp_guard": "XP_UNIX"
  },
  "FONTLIST_INITOTHERFAMILYNAMES": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "Time(ms) spent on reading other family names from all fonts"
  },
  "FONTLIST_INITFACENAMELISTS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "Time(ms) spent on reading family names from all fonts"
  },
  "DWRITEFONT_DELAYEDINITFONTLIST_TOTAL": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "gfxDWriteFontList::DelayedInitFontList Total (ms)",
    "cpp_guard": "XP_WIN"
  },
  "DWRITEFONT_DELAYEDINITFONTLIST_COUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "gfxDWriteFontList::DelayedInitFontList Font Family Count",
    "cpp_guard": "XP_WIN"
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  "DWRITEFONT_DELAYEDINITFONTLIST_COLLECT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "gfxDWriteFontList::DelayedInitFontList GetSystemFontCollection (ms)",
    "cpp_guard": "XP_WIN"
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  "DWRITEFONT_INIT_PROBLEM": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 8,
    "description": "DirectWrite system fontlist initialization problem (1=GDI interop, 2=system font collection, 3=no fonts)",
    "cpp_guard": "XP_WIN"
  },
  "GDI_INITFONTLIST_TOTAL": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "gfxGDIFontList::InitFontList Total (ms)",
    "cpp_guard": "XP_WIN"
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  "MAC_INITFONTLIST_TOTAL": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "gfxMacPlatformFontList::InitFontList Total (ms)",
    "cpp_guard": "XP_DARWIN"
  },
  "SYSTEM_FONT_FALLBACK": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 100000,
    "n_buckets": 50,
    "description": "System font fallback (us)"
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  "SYSTEM_FONT_FALLBACK_FIRST": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 40000,
    "n_buckets": 20,
    "description": "System font fallback, first call (ms)"
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  "SYSTEM_FONT_FALLBACK_SCRIPT": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 110,
    "description": "System font fallback script"
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  "GRADIENT_DURATION": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 50000000,
    "n_buckets": 20,
    "description": "Gradient generation time (us)"
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  "GRADIENT_RETENTION_TIME": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 10000,
    "n_buckets": 20,
    "description": "Maximum retention time for the gradient cache. (ms)"
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  "WORD_CACHE_HITS_CONTENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 256,
    "n_buckets": 30,
    "description": "Word cache hits, content text (chars)"
  },
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    "expires_in_version": "never",
    "kind": "exponential",
    "high": 256,
    "n_buckets": 30,
    "description": "Word cache hits, chrome text (chars)"
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  "WORD_CACHE_MISSES_CONTENT": {
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    "kind": "exponential",
    "high": 256,
    "n_buckets": 30,
    "description": "Word cache misses, content text (chars)"
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  "WORD_CACHE_MISSES_CHROME": {
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    "kind": "exponential",
    "high": 256,
    "n_buckets": 30,
    "description": "Word cache misses, chrome text (chars)"
  },
  "FONT_CACHE_HIT": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "font cache hit"
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  "BAD_FALLBACK_FONT": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "system fallback font can't be used"
  },
  "SHUTDOWN_OK": {
    "expires_in_version": "default",
    "kind": "boolean",
    "description": "Did the browser start after a successful shutdown"
  },
  "IMAGE_DECODE_LATENCY_US": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 5000000,
    "n_buckets": 100,
    "description": "Time spent decoding an image chunk (us)"
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  "IMAGE_DECODE_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 50000000,
    "n_buckets": 100,
    "description": "Time spent decoding an image (us)"
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  "IMAGE_DECODE_ON_DRAW_LATENCY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 50000000,
    "n_buckets": 100,
    "description": "Time from starting a decode to it showing up on the screen (us)"
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  "IMAGE_DECODE_CHUNKS": {
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    "kind": "exponential",
    "high": 500,
    "n_buckets": 50,
    "description": "Number of chunks per decode attempt"
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  "IMAGE_DECODE_COUNT": {
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    "kind": "exponential",
    "high": 500,
    "n_buckets": 50,
    "description": "Decode count"
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  "IMAGE_DECODE_SPEED_JPEG": {
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    "kind": "exponential",
    "low": 500,
    "high": 50000000,
    "n_buckets": 50,
    "description": "JPEG image decode speed (Kbytes/sec)"
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    "low": 500,
    "high": 50000000,
    "n_buckets": 50,
    "description": "GIF image decode speed (Kbytes/sec)"
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  "IMAGE_DECODE_SPEED_PNG": {
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    "kind": "exponential",
    "low": 500,
    "high": 50000000,
    "n_buckets": 50,
    "description": "PNG image decode speed (Kbytes/sec)"
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  "CANVAS_2D_USED": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "2D canvas used"
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  "CANVAS_WEBGL_ACCL_FAILURE_ID": {
    "alert_emails": ["gfx-telemetry-alerts@mozilla.com","bgirard@mozilla.com","msreckovic@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "keyed": true,
    "description": "Track the failure IDs that lead us to reject attempting to create an accelerated context. CANVAS_WEBGL_FAILURE_ID reports the overall WebGL status with the attempt to fallback.",
    "bug_numbers": [1272808]
  },
  "CANVAS_WEBGL_FAILURE_ID": {
    "alert_emails": ["gfx-telemetry-alerts@mozilla.com","bgirard@mozilla.com","msreckovic@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "keyed": true,
    "description": "WebGL runtime and dynamic failure IDs. This will record a count for each context creation success or failure. Each failure id is a unique identifier that can be traced back to a particular failure branch or blocklist rule.",
    "bug_numbers": [1272808]
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  "CANVAS_WEBGL_SUCCESS": {
    "alert_emails": ["jmuizelaar@mozilla.com"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "WebGL1 creation success",
    "bug_numbers": [1247327]
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  "CANVAS_WEBGL_USED": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "WebGL canvas used"
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  "CANVAS_WEBGL2_SUCCESS": {
    "alert_emails": ["jmuizelaar@mozilla.com"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "WebGL2 creation success",
    "bug_numbers": [1247327]
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  "TOTAL_CONTENT_PAGE_LOAD_TIME": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 100,
    "high": 30000,
    "n_buckets": 100,
    "description": "HTTP: Total page load time (ms)"
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  "HTTP_SUBITEM_OPEN_LATENCY_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Page start -> subitem open() (ms)"
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  "HTTP_SUBITEM_FIRST_BYTE_LATENCY_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Page start -> first byte received for subitem reply (ms)"
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  "HTTP_REQUEST_PER_PAGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50,
    "description": "HTTP: Requests per page (count)"
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  "HTTP_REQUEST_PER_PAGE_FROM_CACHE": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 101,
    "description": "HTTP: Requests serviced from cache (%)"
  },
  "HTTP_REQUEST_PER_CONN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50,
    "description": "HTTP: requests per connection"
  },
  "HTTP_KBREAD_PER_CONN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 50,
    "description": "HTTP: KB read per connection"
  },
  "HTTP_PAGE_DNS_ISSUE_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: open() -> DNS request issued (ms)"
  },
  "HTTP_PAGE_DNS_LOOKUP_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: DNS lookup time (ms)"
  },
  "HTTP_PAGE_TCP_CONNECTION": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: TCP connection setup (ms)"
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  "HTTP_PAGE_OPEN_TO_FIRST_SENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Open -> first byte of request sent (ms)"
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  "HTTP_PAGE_FIRST_SENT_TO_LAST_RECEIVED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: First byte of request sent -> last byte of response received (ms)"
  },
  "HTTP_PAGE_OPEN_TO_FIRST_RECEIVED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Open -> first byte of reply received (ms)"
  },
  "HTTP_PAGE_OPEN_TO_FIRST_FROM_CACHE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Open -> cache read start (ms)"
  },
  "HTTP_PAGE_OPEN_TO_FIRST_FROM_CACHE_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Open -> cache read start (ms), [cache2]"
  },
  "HTTP_PAGE_CACHE_READ_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Cache read time (ms)"
  },
  "HTTP_PAGE_CACHE_READ_TIME_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Cache read time (ms) [cache2]"
  },
  "HTTP_PAGE_REVALIDATION": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Positive cache validation time (ms)"
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  "HTTP_PAGE_COMPLETE_LOAD": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Overall load time - all (ms)"
  },
  "HTTP_PAGE_COMPLETE_LOAD_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Overall load time - all (ms) [cache2]"
  },
  "HTTP_PAGE_COMPLETE_LOAD_CACHED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Overall load time - cache hits (ms)"
  },
  "HTTP_PAGE_COMPLETE_LOAD_CACHED_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Overall load time - cache hits (ms) [cache2]"
  },
  "HTTP_PAGE_COMPLETE_LOAD_NET": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Overall load time - network (ms)"
  },
  "HTTP_PAGE_COMPLETE_LOAD_NET_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP page: Overall load time - network (ms) [cache2]"
  },
  "HTTP_SUB_DNS_ISSUE_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: open() -> DNS request issued (ms)"
  },
  "HTTP_SUB_DNS_LOOKUP_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: DNS lookup time (ms)"
  },
  "HTTP_SUB_TCP_CONNECTION": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: TCP connection setup (ms)"
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  "HTTP_SUB_OPEN_TO_FIRST_SENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Open -> first byte of request sent (ms)"
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  "HTTP_SUB_FIRST_SENT_TO_LAST_RECEIVED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: First byte of request sent -> last byte of response received (ms)"
  },
  "HTTP_SUB_OPEN_TO_FIRST_RECEIVED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Open -> first byte of reply received (ms)"
  },
  "HTTP_SUB_OPEN_TO_FIRST_FROM_CACHE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Open -> cache read start (ms)"
  },
  "HTTP_SUB_OPEN_TO_FIRST_FROM_CACHE_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Open -> cache read start (ms) [cache2]"
  },
  "HTTP_SUB_CACHE_READ_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Cache read time (ms)"
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  "HTTP_SUB_CACHE_READ_TIME_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Cache read time (ms) [cache2]"
  },
  "HTTP_SUB_REVALIDATION": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Positive cache validation time (ms)"
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  "HTTP_SUB_COMPLETE_LOAD": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Overall load time - all (ms)"
  },
  "HTTP_SUB_COMPLETE_LOAD_V2": {
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    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Overall load time - all (ms) [cache2]"
  },
  "HTTP_SUB_COMPLETE_LOAD_CACHED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Overall load time - cache hits (ms)"
  },
  "HTTP_SUB_COMPLETE_LOAD_CACHED_V2": {
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    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Overall load time - cache hits (ms) [cache2]"
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  "HTTP_SUB_COMPLETE_LOAD_NET": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Overall load time - network (ms)"
  },
  "HTTP_SUB_COMPLETE_LOAD_NET_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 50,
    "description": "HTTP subitem: Overall load time - network (ms) [cache2]"
  },
  "HTTP_PROXY_TYPE": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 8,
    "description": "HTTP Proxy Type (none, http, socks)"
  },
  "HTTP_TRANSACTION_IS_SSL": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Whether a HTTP transaction was over SSL or not."
  },
  "HTTP_PAGELOAD_IS_SSL": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Whether a HTTP base page load was over SSL or not."
  },
  "HTTP_TRANSACTION_USE_ALTSVC": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Whether a HTTP transaction was routed via Alt-Svc or not."
  },
  "HTTP_TRANSACTION_USE_ALTSVC_OE": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Whether a HTTP transaction routed via Alt-Svc was scheme=http"
  },
  "HTTP_SCHEME_UPGRADE": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 10,
    "description": "Was the URL upgraded to HTTPS?  (0=already HTTPS, 1=no reason to upgrade, 2=STS upgrade blocked by pref, 3=upgraded with STS, 4=upgraded with CSP)"
  },
  "HTTP_RESPONSE_STATUS_CODE": {
    "alert_emails": ["ckerschbaumer@mozilla.com"],
    "bug_numbers": [1272345, 1296287],
    "expires_in_version": "56",
    "kind": "enumerated",
    "n_values": 12,
    "description": "Whether the URL gets redirected?  (0=200, 1=301, 2=302, 3=304, 4=307, 5=308, 6=400, 7=401, 8=403, 9=404, 10=500, 11=other)"
  },
  "HTTP_NET_VS_CACHE_ONSTART_QSMALL_NORMALPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference (ms) for requests with a normal priority and small queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTART_QMED_NORMALPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference (ms) for requests with a normal priority and medium queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTART_QBIG_NORMALPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference (ms) for requests with a normal priority and large queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTART_QSMALL_HIGHPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference (ms) for requests with a high priority and small queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTART_QMED_HIGHPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference (ms) for requests with a high priority and medium queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTART_QBIG_HIGHPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference (ms) for requests with a high priority and large queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_QSMALL_NORMALPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for requests with a normal priority and small queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_QMED_NORMALPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for requests with a normal priority and medium queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_QBIG_NORMALPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for requests with a normal priority and large queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_QSMALL_HIGHPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for requests with a high priority and small queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_QMED_HIGHPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for requests with a high priority and medium queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_QBIG_HIGHPRI_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for requests with a high priority and large queue. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_SMALL_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for cache files with a small size (<256K). Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_LARGE_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) for cache files with a large size (>=256K). Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTART_REVALIDATED_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference revalidated cache entries. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTART_NOTREVALIDATED_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStartRequest) difference (ms) not revalidated cache entries. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_REVALIDATED_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) revalidated cache entries. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_NET_VS_CACHE_ONSTOP_NOTREVALIDATED_V2": {
    "expires_in_version": "58",
      "alert_emails": ["necko@mozilla.com"],
      "bug_numbers": [1325322],
      "kind": "enumerated",
      "n_values": 80,
      "description": "Network vs cache time load (OnStopRequest) difference (ms) not revalidated cache entries. Cache wins: 41-50 for 1-100ms, 51-59 for 101-1000ms, 60-68 for 1-10s, 69-73 for 11-60s and 74 for > 1m. Network wins: 39-30 for 1-100ms, 29-21 for 101-1000ms, 20-12 for 1-10s, 11-7 for 11-60s and 6 for > 1m."
  },
  "HTTP_AUTH_DIALOG_STATS": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 4,
    "description": "Stats about what kind of resource requested http authentication. (0=top-level doc, 1=same origin subresources, 2=cross-origin subresources, 3=xhr)"
  },
  "HTTP_AUTH_TYPE_STATS": {
    "alert_emails": ["rbarnes@mozilla.com"],
    "bug_numbers": [1266571],
    "expires_in_version": "52",
    "kind": "enumerated",
    "n_values": 8,
    "releaseChannelCollection": "opt-out",
    "description": "Recorded once for each HTTP 401 response. The value records the type of authentication and the TLS-enabled status. (0=basic/clear, 1=basic/tls, 2=digest/clear, 3=digest/tls, 4=ntlm/clear, 5=ntlm/tls, 6=negotiate/clear, 7=negotiate/tls)"
  },
  "TLS_EARLY_DATA_NEGOTIATED": {
    "expires_in_version": "58",
    "kind": "enumerated",
    "n_values": 3,
    "description": "Sending TLS early data was possible: 0 - not possible, 1 - possible but not used, 2 - possible and used.",
    "alert_emails": ["necko@mozilla.com"],
    "bug_numbers": [1296288]
  },
  "TLS_EARLY_DATA_ACCEPTED": {
    "expires_in_version": "58",
    "kind": "boolean",
    "description": "TLS early data was used and it was accepted (true) or rejected (false) by the remote host.",
    "alert_emails": ["necko@mozilla.com"],
    "bug_numbers": [1296288]
  },
  "TLS_EARLY_DATA_BYTES_WRITTEN": {
    "expires_in_version": "58",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 100,
    "description": "Amount of bytes sent using TLS early data at the start of a TLS connection for a given channel.",
    "alert_emails": ["necko@mozilla.com"],
    "bug_numbers": [1296288]
  },
  "SSL_HANDSHAKE_VERSION": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "bug_numbers": [1250568],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 16,
    "description": "SSL Version (1=tls1, 2=tls1.1, 3=tls1.2, 4=tls1.3)"
  },
  "SSL_HANDSHAKE_RESULT": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "bug_numbers": [1331280],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 672,
    "releaseChannelCollection": "opt-out",      
    "description": "SSL handshake result, 0=success, 1-255=NSS error offset, 256-511=SEC error offset + 256, 512-639=NSPR error offset + 512, 640-670=PKIX error, 671=unknown err"
  },
  "SSL_TIME_UNTIL_READY": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 200,
    "description": "ms of SSL wait time including TCP and proxy tunneling"
  },
  "SSL_TIME_UNTIL_HANDSHAKE_FINISHED": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 200,
    "description": "ms of SSL wait time for full handshake including TCP and proxy tunneling"
  },
  "SSL_BYTES_BEFORE_CERT_CALLBACK": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 32000,
    "n_buckets": 64,
    "description": "plaintext bytes read before a server certificate authenticated"
  },
  "SSL_NPN_TYPE": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 16,
    "description": "NPN Results (0=none, 1=negotiated, 2=no-overlap, 3=selected(alpn))"
  },
  "SSL_RESUMED_SESSION": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "complete TLS connect that used TLS Sesison Resumption"
  },
  "CERT_VALIDATION_HTTP_REQUEST_RESULT": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 16,
    "description": "HTTP result of OCSP, etc.. (0=canceled, 1=OK, 2=FAILED, 3=internal-error)"
  },
  "CERT_VALIDATION_HTTP_REQUEST_CANCELED_TIME": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 200,
    "description": "ms elapsed time of OCSP etc.. that was canceled"
  },
  "CERT_VALIDATION_HTTP_REQUEST_SUCCEEDED_TIME": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 200,
    "description": "ms elapsed time of OCSP etc.. that succeeded"
  },
  "CERT_VALIDATION_HTTP_REQUEST_FAILED_TIME": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 200,
    "description": "ms elapsed time of OCSP etc.. that failed"
  },
  "SSL_KEY_EXCHANGE_ALGORITHM_FULL": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 16,
    "description": "SSL Handshake Key Exchange Algorithm for full handshake (null=0, rsa=1, dh=2, fortezza=3, ecdh=4)"
  },
  "SSL_KEY_EXCHANGE_ALGORITHM_RESUMED": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 16,
    "description": "SSL Handshake Key Exchange Algorithm for resumed handshake (null=0, rsa=1, dh=2, fortezza=3, ecdh=4)"
  },
  "SSL_OBSERVED_END_ENTITY_CERTIFICATE_LIFETIME": {
    "expires_in_version": "55",
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "kind": "enumerated",
    "n_values": 125,
    "releaseChannelCollection": "opt-out",
    "description": "The lifetime of accepted HTTPS server certificates, in weeks, up to 2 years. Bucket 105 is all end-entity HTTPS server certificates with a lifetime > 2 years."
  },
  "KEYGEN_GENERATED_KEY_TYPE": {
    "expires_in_version": "55",
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "kind": "count",
    "keyed": true,
    "releaseChannelCollection": "opt-out",
    "bug_numbers": [1191414,1284945],
    "description": "The number of times we generate a key via keygen, keyed on algorithm and keysize. Keys include RSA with key size (512, 1024, 2048, possibly others), secp384r1, secp256r1, and 'other_ec'."
  },
  "WEBSOCKETS_HANDSHAKE_TYPE": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 16,
    "description": "Websockets Handshake Results (ws-ok-plain, ws-ok-proxy, ws-failed-plain, ws-failed-proxy, wss-ok-plain, wss-ok-proxy, wss-failed-plain, wss-failed-proxy)"
  },
  "SPDY_VERSION2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 48,
    "description": "SPDY: Protocol Version Used"
  },
  "HTTP_RESPONSE_VERSION": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 48,
    "description": "HTTP: Protocol Version Used on Response from nsHttp.h"
  },
  "HTTP_09_INFO": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 4,
    "description": "HTTP 09 Response Breakdown: lowbit subresource, high bit nonstd port",
    "bug_numbers": [1262572],
    "alert_emails": ["necko@mozilla.com"]
  },
  "SPDY_PARALLEL_STREAMS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50,
    "description": "SPDY: Streams concurrent active per connection"
  },
  "SPDY_REQUEST_PER_CONN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50,
    "description": "SPDY: Streams created per connection"
  },
  "SPDY_SERVER_INITIATED_STREAMS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 100000,
    "n_buckets": 250,
    "description": "SPDY: Streams recevied per connection"
  },
  "SPDY_CHUNK_RECVD": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 100,
    "description": "SPDY: Recvd Chunk Size (rounded to KB)"
  },
  "SPDY_SYN_SIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 20,
    "high": 20000,
    "n_buckets": 50,
    "description": "SPDY: SYN Frame Header Size"
  },
  "SPDY_SYN_RATIO": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 99,
    "n_buckets": 20,
    "description": "SPDY: SYN Frame Header Ratio (lower better)"
  },
  "SPDY_SYN_REPLY_SIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 16,
    "high": 20000,
    "n_buckets": 50,
    "description": "SPDY: SYN Reply Header Size"
  },
  "SPDY_SYN_REPLY_RATIO": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 99,
    "n_buckets": 20,
    "description": "SPDY: SYN Reply Header Ratio (lower better)"
  },
  "SPDY_NPN_CONNECT": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "SPDY: NPN Negotiated"
  },
  "SPDY_NPN_JOIN": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "SPDY: Coalesce Succeeded"
  },
  "SPDY_KBREAD_PER_CONN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 50,
    "description": "SPDY: KB read per connection"
  },
  "SPDY_SETTINGS_UL_BW": {
    "expires_in_version": "42",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 100,
    "description": "SPDY: Settings Upload Bandwidth"
  },
  "SPDY_SETTINGS_DL_BW": {
    "expires_in_version": "42",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 100,
    "description": "SPDY: Settings Download Bandwidth"
  },
  "SPDY_SETTINGS_RTT": {
    "expires_in_version": "42",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 100,
    "description": "SPDY: Settings RTT"
  },
  "SPDY_SETTINGS_MAX_STREAMS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 100,
    "description": "H2: Settings Max Streams parameter"
  },
  "SPDY_SETTINGS_CWND": {
    "expires_in_version": "42",
    "kind": "exponential",
    "high": 500,
    "n_buckets": 50,
    "description": "SPDY: Settings CWND (packets)"
  },
  "SPDY_SETTINGS_RETRANS": {
    "expires_in_version": "42",
    "kind": "exponential",
    "high": 100,
    "n_buckets": 50,
    "description": "SPDY: Retransmission Rate"
  },
  "SPDY_SETTINGS_IW": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50,
    "description": "H2: Settings Initial Window (rounded to KB)"
  },
  "SPDY_GOAWAY_LOCAL": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 32,
    "description": "H2: goaway reason client sent from rfc 7540. 31 is none sent."
  },
  "SPDY_GOAWAY_PEER": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 32,
    "description": "H2: goaway reason from peer from rfc 7540. 31 is none received."
  },
  "SPDY_CONTINUED_HEADERS": {
    "expires_in_version": "59",
    "alert_emails": ["necko@mozilla.com"],
    "bug_numbers": [1324855],
    "kind": "exponential",
    "high": 32000000,
    "n_buckets": 75,
    "description": "Size of continued H2 headers in bytes."
  },
  "HPACK_ELEMENTS_EVICTED_DECOMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 256,
    "n_buckets": 50,
    "description": "HPACK: Number of items removed from dynamic table to make room for 1 new item",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_BYTES_EVICTED_DECOMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 8192,
    "n_buckets": 50,
    "description": "HPACK: Number of bytes removed from dynamic table to make room for 1 new item",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_BYTES_EVICTED_RATIO_DECOMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 256,
    "n_buckets": 50,
    "description": "HPACK: Ratio of bytes evicted to bytes added (* 100)",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_PEAK_COUNT_DECOMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1024,
    "n_buckets": 50,
    "description": "HPACK: peak number of items in the dynamic table",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_PEAK_SIZE_DECOMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 16384,
    "n_buckets": 100,
    "description": "HPACK: peak size in bytes of the table",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_ELEMENTS_EVICTED_COMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 256,
    "n_buckets": 50,
    "description": "HPACK: Number of items removed from dynamic table to make room for 1 new item",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_BYTES_EVICTED_COMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 8192,
    "n_buckets": 50,
    "description": "HPACK: Number of bytes removed from dynamic table to make room for 1 new item",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_BYTES_EVICTED_RATIO_COMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 256,
    "n_buckets": 50,
    "description": "HPACK: Ratio of bytes evicted to bytes added (* 100)",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_PEAK_COUNT_COMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1024,
    "n_buckets": 50,
    "description": "HPACK: peak number of items in the dynamic table",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HPACK_PEAK_SIZE_COMPRESSOR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 16384,
    "n_buckets": 100,
    "description": "HPACK: peak size in bytes of the table",
    "alert_emails": ["necko@mozilla.com", "hurley@mozilla.com"],
    "bug_numbers": [1296280]
  },
  "HTTP_CHANNEL_DISPOSITION" : {
    "alert_emails": ["necko@mozilla.com"],
    "bug_numbers": [1341128],
    "expires_in_version": "60",
    "kind": "enumerated",
    "n_values": 16,
    "releaseChannelCollection": "opt-out",
    "description": "Channel Disposition: 0=Cancel, 1=Disk, 2=NetOK, 3=NetEarlyFail, 4=NetlateFail, +8 for HTTPS"
  },
  "HTTP_CONNECTION_ENTRY_CACHE_HIT_1" : {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Fraction of sockets that used a nsConnectionEntry with history - size 300."
  },
  "HTTP_CACHE_DISPOSITION_2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 5,
    "description": "HTTP Cache Hit, Reval, Failed-Reval, Miss"
  },
  "HTTP_CACHE_DISPOSITION_2_V2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 5,
    "description": "HTTP Cache v2 Hit, Reval, Failed-Reval, Miss"
  },
  "HTTP_DISK_CACHE_DISPOSITION_2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 5,
    "description": "HTTP Disk Cache Hit, Reval, Failed-Reval, Miss"
  },
  "HTTP_CACHE_MISS_HALFLIFE_EXPERIMENT_2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 4,
    "description": "HTTP Cache v2 Miss by half-life value (5 min, 15 min, 1 hour, 6 hours)"
  },
  "HTTP_CACHE_ENTRY_RELOAD_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 900000,
    "n_buckets": 50,
    "description": "Time before we reload an HTTP cache entry again to memory"
  },
  "HTTP_CACHE_ENTRY_ALIVE_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 7200000,
    "n_buckets": 50,
    "description": "Time for which an HTTP cache entry is kept warmed in memory"
  },
  "HTTP_CACHE_ENTRY_REUSE_COUNT": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 20,
    "n_buckets": 19,
    "description": "Reuse count of an HTTP cache entry warmed in memory"
  },
  "HTTP_MEMORY_CACHE_DISPOSITION_2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 5,
    "description": "HTTP Memory Cache Hit, Reval, Failed-Reval, Miss"
  },
  "HTTP_OFFLINE_CACHE_DISPOSITION_2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 5,
    "description": "HTTP Offline Cache Hit, Reval, Failed-Reval, Miss"
  },
  "HTTP_OFFLINE_CACHE_DOCUMENT_LOAD": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Rate of page load from offline cache"
  },
  "HTTP_CACHE_IO_QUEUE_2_OPEN_PRIORITY": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_READ_PRIORITY": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_MANAGEMENT": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_OPEN": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_READ": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_WRITE": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_WRITE_PRIORITY": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_INDEX": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "HTTP_CACHE_IO_QUEUE_2_EVICT": {
    "alert_emails": ["hbambas@mozilla.com"],
    "bug_numbers": [1294183],
    "expires_in_version": "55",
    "kind": "enumerated",
    "n_values": 10,
    "description": "HTTP Cache IO queue length"
  },
  "CACHE_DEVICE_SEARCH_2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time to search cache (ms)"
  },
  "CACHE_MEMORY_SEARCH_2": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time to search memory cache (ms)"
  },
  "CACHE_DISK_SEARCH_2": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time to search disk cache (ms)"
  },
  "CACHE_OFFLINE_SEARCH_2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time to search offline cache (ms)"
  },
  "TRANSACTION_WAIT_TIME_HTTP": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 100,
    "description": "Time from submission to dispatch of HTTP transaction (ms)"
  },
  "TRANSACTION_WAIT_TIME_SPDY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 100,
    "description": "Time from submission to dispatch of SPDY transaction (ms)"
  },
  "HTTP_SAW_QUIC_ALT_PROTOCOL": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Fraction of responses with a quic alt-protocol advertisement."
  },
  "HTTP_CONTENT_ENCODING": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 6,
    "description": "encoding removed: 0=unknown, 1=gzip, 2=deflate, 3=brotli"
  },
  "HTTP_DISK_CACHE_OVERHEAD": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 32000000,
    "n_buckets": 100,
    "description": "HTTP Disk cache memory overhead (bytes)"
  },
  "CACHE_LM_INCONSISTENT": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Cache discovered inconsistent last-modified entry"
  },
  "CACHE_SERVICE_LOCK_WAIT_2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms)"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock on the main thread (ms)"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSSETDISKSMARTSIZECALLBACK_NOTIFY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSSETDISKSMARTSIZECALLBACK_NOTIFY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSPROCESSREQUESTEVENT_RUN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSPROCESSREQUESTEVENT_RUN"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSOUTPUTSTREAMWRAPPER_LAZYINIT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSOUTPUTSTREAMWRAPPER_LAZYINIT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSOUTPUTSTREAMWRAPPER_CLOSEINTERNAL": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSOUTPUTSTREAMWRAPPER_CLOSEINTERNAL"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSOUTPUTSTREAMWRAPPER_RELEASE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSOUTPUTSTREAMWRAPPER_RELEASE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCOMPRESSOUTPUTSTREAMWRAPPER_RELEASE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCOMPRESSOUTPUTSTREAMWRAPPER_RELEASE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSINPUTSTREAMWRAPPER_LAZYINIT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSINPUTSTREAMWRAPPER_LAZYINIT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSINPUTSTREAMWRAPPER_CLOSEINTERNAL": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSINPUTSTREAMWRAPPER_CLOSEINTERNAL"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSINPUTSTREAMWRAPPER_RELEASE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSINPUTSTREAMWRAPPER_RELEASE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSDECOMPRESSINPUTSTREAMWRAPPER_RELEASE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSDECOMPRESSINPUTSTREAMWRAPPER_RELEASE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SHUTDOWN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SHUTDOWN"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETOFFLINECACHEENABLED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETOFFLINECACHEENABLED"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETOFFLINECACHECAPACITY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETOFFLINECACHECAPACITY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETMEMORYCACHE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETMEMORYCACHE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETDISKSMARTSIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETDISKSMARTSIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETDISKCACHEMAXENTRYSIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETDISKCACHEMAXENTRYSIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETMEMORYCACHEMAXENTRYSIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETMEMORYCACHEMAXENTRYSIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETDISKCACHEENABLED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETDISKCACHEENABLED"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_SETDISKCACHECAPACITY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_SETDISKCACHECAPACITY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_OPENCACHEENTRY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_OPENCACHEENTRY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_ONPROFILESHUTDOWN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_ONPROFILESHUTDOWN"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_ONPROFILECHANGED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_ONPROFILECHANGED"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_ISSTORAGEENABLEDFORPOLICY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_ISSTORAGEENABLEDFORPOLICY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_GETCACHEIOTARGET": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_GETCACHEIOTARGET"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_EVICTENTRIESFORCLIENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_EVICTENTRIESFORCLIENT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_DISKDEVICEHEAPSIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_DISKDEVICEHEAPSIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_CLOSEALLSTREAMS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_CLOSEALLSTREAMS"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_DOOM": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_DOOM"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_SETPREDICTEDDATASIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_SETPREDICTEDDATASIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETDATASIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETDATASIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETSTORAGEDATASIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETSTORAGEDATASIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_REQUESTDATASIZECHANGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_REQUESTDATASIZECHANGE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_SETDATASIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_SETDATASIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_OPENINPUTSTREAM": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_OPENINPUTSTREAM"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_OPENOUTPUTSTREAM": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_OPENOUTPUTSTREAM"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETCACHEELEMENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETCACHEELEMENT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_SETCACHEELEMENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_SETCACHEELEMENT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETSTORAGEPOLICY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETSTORAGEPOLICY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_SETSTORAGEPOLICY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_SETSTORAGEPOLICY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETFILE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETFILE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETSECURITYINFO": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETSECURITYINFO"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_SETSECURITYINFO": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_SETSECURITYINFO"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_DOOMANDFAILPENDINGREQUESTS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_DOOMANDFAILPENDINGREQUESTS"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_MARKVALID": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_MARKVALID"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_CLOSE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_CLOSE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETMETADATAELEMENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETMETADATAELEMENT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_SETMETADATAELEMENT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_SETMETADATAELEMENT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_VISITMETADATA": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_VISITMETADATA"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_SETEXPIRATIONTIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_SETEXPIRATIONTIME"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_ISSTREAMBASED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_ISSTREAMBASED"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETLASTMODIFIED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETLASTMODIFIED"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETEXPIRATIONTIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETEXPIRATIONTIME"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETKEY": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETKEY"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETFETCHCOUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETFETCHCOUNT"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETDEVICEID": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETDEVICEID"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_PROCESSREQUEST": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_PROCESSREQUEST"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHESERVICE_VISITENTRIES": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHESERVICE_VISITENTRIES"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETPREDICTEDDATASIZE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETPREDICTEDDATASIZE"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETLASTFETCHED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETLASTFETCHED"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSCACHEENTRYDESCRIPTOR_GETCLIENTID": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSCACHEENTRYDESCRIPTOR_GETCLIENTID"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSBLOCKONCACHETHREADEVENT_RUN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSBLOCKONCACHETHREADEVENT_RUN"
  },
  "CACHE_SERVICE_LOCK_WAIT_MAINTHREAD_NSASYNCDOOMEVENT_RUN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time spent waiting on the cache service lock (ms) on the main thread in NSASYNCDOOMEVENT_RUN"
  },
  "DNT_USAGE": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 3,
    "description": "I want to be tracked, I do NOT want to be tracked, DNT unset"
  },
  "DNS_LOOKUP_METHOD2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 16,
    "description": "DNS Lookup Type (hit, renewal, negative-hit, literal, overflow, network-first, network-shared)"
  },
  "DNS_CLEANUP_AGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1440,
    "n_buckets": 50,
    "description": "DNS Cache Entry Age at Removal Time (minutes)"
  },
  "DNS_LOOKUP_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "description": "Time for a successful DNS OS resolution (msec)"
  },
  "DNS_RENEWAL_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "description": "Time for a renewed DNS OS resolution (msec)"
  },
  "DNS_RENEWAL_TIME_FOR_TTL": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "description": "Time for a DNS OS resolution (msec) used to get TTL"
  },
  "DNS_FAILED_LOOKUP_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "description": "Time for an unsuccessful DNS OS resolution (msec)"
  },
  "DNS_BLACKLIST_COUNT": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 21,
    "n_buckets": 20,
    "description": "The number of unusable addresses reported for each record"
  },
  "REFRESH_DRIVER_TICK" : {
    "expires_in_version": "never",
    "description": "Total time spent ticking the refresh driver in milliseconds",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50
  },
  "PAINT_BUILD_DISPLAYLIST_TIME" : {
    "expires_in_version": "never",
    "description": "Time spent in building displaylists in milliseconds",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50
  },
  "PAINT_RASTERIZE_TIME" : {
    "expires_in_version": "never",
    "description": "Time spent rasterizing each frame in milliseconds",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 50
  },
  "PREDICTOR_PREDICT_ATTEMPTS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "Number of times nsINetworkPredictor::Predict is called and attempts to predict"
  },
  "PREDICTOR_LEARN_ATTEMPTS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "Number of times nsINetworkPredictor::Learn is called and attempts to learn"
  },
  "PREDICTOR_PREDICT_FULL_QUEUE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "description": "Number of times nsINetworkPredictor::Predict doesn't continue because the queue is full"
  },
  "PREDICTOR_LEARN_FULL_QUEUE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "description": "Number of times nsINetworkPredictor::Learn doesn't continue because the queue is full"
  },
  "PREDICTOR_WAIT_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Amount of time a predictor event waits in the queue (ms)"
  },
  "PREDICTOR_PREDICT_WORK_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Amount of time spent doing the work for predict (ms)",
    "alert_emails": ["necko@mozilla.com"]
  },
  "PREDICTOR_LEARN_WORK_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Amount of time spent doing the work for learn (ms)"
  },
  "PREDICTOR_TOTAL_PREDICTIONS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many actual predictions (preresolves, preconnects, ...) happen"
  },
  "PREDICTOR_TOTAL_PREFETCHES": {
    "expires_in_version": "never",
    "alert_emails": [],
    "bug_numbers": [1016628],
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many actual prefetches happen"
  },
  "PREDICTOR_TOTAL_PREFETCHES_USED": {
    "expires_in_version": "never",
    "alert_emails": [],
    "bug_numbers": [1016628],
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many prefetches are actually used by a channel"
  },
  "PREDICTOR_PREFETCH_TIME": {
    "expires_in_version": "never",
    "alert_emails": [],
    "bug_numbers": [1016628],
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "How long it takes from OnStartRequest to OnStopRequest for a prefetch"
  },
  "PREDICTOR_TOTAL_PRECONNECTS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many actual preconnects happen"
  },
  "PREDICTOR_TOTAL_PRECONNECTS_CREATED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many preconnects actually created a speculative socket"
  },
  "PREDICTOR_TOTAL_PRECONNECTS_USED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many preconnects actually created a used speculative socket"
  },
  "PREDICTOR_TOTAL_PRECONNECTS_UNUSED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many preconnects needlessly created a speculative socket"
  },
  "PREDICTOR_TOTAL_PRERESOLVES": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many actual preresolves happen"
  },
  "PREDICTOR_PREDICTIONS_CALCULATED": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many prediction calculations are performed"
  },
  "PREDICTOR_GLOBAL_DEGRADATION": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 50,
    "description": "The global degradation calculated"
  },
  "PREDICTOR_SUBRESOURCE_DEGRADATION": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 50,
    "description": "The degradation calculated for a subresource"
  },
  "PREDICTOR_BASE_CONFIDENCE": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 50,
    "description": "The base confidence calculated for a subresource"
  },
  "PREDICTOR_CONFIDENCE": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 50,
    "description": "The final confidence calculated for a subresource"
  },
  "PREDICTOR_PREDICT_TIME_TO_ACTION": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "How long it takes from the time Predict() is called to the time we take action",
    "alert_emails": ["necko@mozilla.com"]
  },
  "PREDICTOR_PREDICT_TIME_TO_INACTION": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "How long it takes from the time Predict() is called to the time we figure out there's nothing to do"
  },
  "HTTPCONNMGR_TOTAL_SPECULATIVE_CONN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many speculative http connections are created"
  },
  "HTTPCONNMGR_USED_SPECULATIVE_CONN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many speculative http connections are actually used"
  },
  "HTTPCONNMGR_UNUSED_SPECULATIVE_CONN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000000,
    "n_buckets": 50,
    "description": "How many speculative connections are made needlessly"
  },
  "TAP_TO_LOAD_IMAGE_SIZE": {
    "expires_in_version": "50",
    "kind": "exponential",
    "high": 32768,
    "n_buckets": 50,
    "description": "The size of the image being shown, when using tap-to-load images. (kilobytes)",
    "bug_numbers": [1208167]
  },
  "STS_POLL_AND_EVENTS_CYCLE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "The duraion of a socketThread cycle, including polls and pending events. (ms)"
  },
  "STS_NUMBER_OF_PENDING_EVENTS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 2000,
    "n_buckets": 100,
    "description": "Number of pending events per SocketThread cycle."
  },
  "STS_POLL_CYCLE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "The duration of poll. (ms)"
  },
  "STS_POLL_AND_EVENT_THE_LAST_CYCLE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "The duraion of the socketThread cycle during shutdown, including polls and pending events. (ms)"
  },
  "STS_NUMBER_OF_PENDING_EVENTS_IN_THE_LAST_CYCLE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 2000,
    "n_buckets": 100,
    "description": "Number of pending events per SocketThread cycle during shutdown."
  },
  "STS_NUMBER_OF_ONSOCKETREADY_CALLS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 2000,
    "n_buckets": 100,
    "description": "Number of OnSocketReady calls during a single poll."
  },
  "STS_POLL_BLOCK_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked on poll (ms)."
  },
  "PRCONNECT_BLOCKING_TIME_NORMAL": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Connect when we are not shutting down and there has been niether a network nor an offline state change in the last 60s (ms)."
  },
  "PRCONNECT_BLOCKING_TIME_SHUTDOWN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Connect during a shutdown (ms)."
  },
  "PRCONNECT_BLOCKING_TIME_CONNECTIVITY_CHANGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Connect when there has been the connectiviy change in the last 60s (ms)."
  },
  "PRCONNECT_BLOCKING_TIME_LINK_CHANGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Connect when there has been a link change in the last 60s (ms)."
  },
  "PRCONNECT_BLOCKING_TIME_OFFLINE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Connect when the offline state has changed in the last 60s (ms)."
  },
  "PRCONNECT_FAIL_BLOCKING_TIME_NORMAL": {
    "bug_numbers": [1257809],
    "alert_emails": ["ddamjanovic@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 100,
    "description": "Time spent blocked in a failed PR_Connect when we are not shutting down and there has been niether a network nor an offline state change in the last 60s (ms)."
  },
  "PRCONNECT_FAIL_BLOCKING_TIME_SHUTDOWN": {
    "bug_numbers": [1257809],
    "alert_emails": ["ddamjanovic@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 100,
    "description": "Time spent blocked in a failed PR_Connect during a shutdown (ms)."
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    "high": 60000,
    "n_buckets": 100,
    "description": "Time spent blocked in a failed PR_Connect when there has been the connectiviy change in the last 60s (ms)."
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    "n_buckets": 100,
    "description": "Time spent blocked in a failed PR_Connect when there has been a link change in the last 60s (ms)."
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    "alert_emails": ["ddamjanovic@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 100,
    "description": "Time spent blocked in a failed PR_Connect when the offline state has changed in the last 60s (ms)."
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    "n_buckets": 1000,
    "description": "Time spent blocked in PR_ConnectContinue when we are not shutting down and there has been niether a network nor an offline state change in the last 60s (ms)."
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    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_ConnectContinue during a shutdown (ms)."
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  "PRCONNECTCONTINUE_BLOCKING_TIME_CONNECTIVITY_CHANGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_ConnectContinue when there has been the connectivity change in the last 60s (ms)."
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    "expires_in_version": "never",
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    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_ConnectContinue when there has been a link change in the last 60s (ms)."
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    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_ConnectContinue when the offline state has changed in the last 60s (ms)."
  },
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    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when we are not shutting down and there has been niether a network nor an offline state change in the last 60s (ms)."
  },
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    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close during a shutdown (ms)."
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    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when there has been the connectivity change in the last 60s (ms)."
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    "expires_in_version": "never",
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    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when there has been a link change in the last 60s (ms)."
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    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when the offline state has changed in the last 60s (ms)."
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    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when we are not shutting down and there has been niether a network nor an offline state change in the last 60s (ms)."
  },
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    "expires_in_version": "never",
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    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close during a shutdown (ms)."
  },
  "PRCLOSE_UDP_BLOCKING_TIME_CONNECTIVITY_CHANGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when there has been the connectivity change in the last 60s (ms)."
  },
  "PRCLOSE_UDP_BLOCKING_TIME_LINK_CHANGE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when there has been a link change in the last 60s (ms)."
  },
  "PRCLOSE_UDP_BLOCKING_TIME_OFFLINE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 1000,
    "description": "Time spent blocked in PR_Close when the offline state has changed in the last 60s (ms)."
  },
  "IPV4_AND_IPV6_ADDRESS_CONNECTIVITY": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 4,
    "description": "Count the number of 0) successful connections to an ipv4 address, 1) failed connection an ipv4 address, 2) successful connection to an ipv6 address and 3) failed connections to an ipv6 address."
  },
  "NETWORK_CONNECTION_COUNT": {
    "alert_emails": ["amarchesini@mozilla.com"],
    "expires_in_version": "58",
    "kind": "count",
    "bug_numbers": [1330255],
    "description": "Number of the use of navigator.connection."
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  "NETWORK_SESSION_AT_900FD": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "session reached 900 fd limit sockets",
    "bug_numbers": [1260218],
    "alert_emails": ["necko@mozilla.com"]
  },
  "NETWORK_PROBE_MAXCOUNT": {
    "expires_in_version": "never",
    "kind": "linear",
    "low": 50,
    "high": 1000,
    "n_buckets": 10,
    "description": "Result of nsSocketTransportService::ProbeMaxCount()",
    "bug_numbers": [1260218],
    "alert_emails": ["necko@mozilla.com"]
  },
  "FIND_PLUGINS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent scanning filesystem for plugins (ms)"
  },
  "CHECK_JAVA_ENABLED": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent checking if Java is enabled (ms)"
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    "expires_in_version": "never",
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  "PLUGIN_HANG_UI_RESPONSE_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 20,
    "description": "Time spent in Plugin Hang UI (ms)"
  },
  "PLUGIN_HANG_TIME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 20,
    "description": "Value of dom.ipc.plugins.hangUITimeoutSecs plus time spent in Plugin Hang UI (ms)"
  },
  "PLUGIN_LOAD_METADATA": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 20,
    "description": "Time spent loading plugin DLL and obtaining metadata (ms)"
  },
  "PLUGIN_SHUTDOWN_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 20,
    "description": "Time spent shutting down plugins (ms)"
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  "FLASH_PLUGIN_STATES": {
    "expires_in_version": "50",
    "kind": "enumerated",
    "n_values": 20,
    "description": "A flash object's initialization state"
  },
  "FLASH_PLUGIN_AREA": {
    "expires_in_version": "50",
    "kind": "exponential",
    "low": 256,
    "high": 16777216,
    "n_buckets": 50,
    "description": "Flash object area (width * height)"
  },
  "FLASH_PLUGIN_WIDTH": {
    "expires_in_version": "50",
    "kind": "linear",
    "low": 1,
    "high": 2000,
    "n_buckets": 50,
    "description": "Flash object width"
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  "FLASH_PLUGIN_HEIGHT": {
    "expires_in_version": "50",
    "kind": "linear",
    "low": 1,
    "high": 2000,
    "n_buckets": 50,
    "description": "Flash object height"
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  "FLASH_PLUGIN_INSTANCES_ON_PAGE": {
    "expires_in_version": "50",
    "kind": "enumerated",
    "n_values": 30,
    "description": "Flash object instances count on page"
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  "MOZ_SQLITE_OPEN_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite open() (ms)"
  },
  "MOZ_SQLITE_OPEN_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite open() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_TRUNCATE_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite truncate() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_TRUNCATE_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite truncate() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_OTHER_READ_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_OTHER_READ_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_PLACES_READ_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_PLACES_READ_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_COOKIES_OPEN_READAHEAD_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on cookie DB open with readahead (ms)"
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  "MOZ_SQLITE_COOKIES_READ_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_COOKIES_READ_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_WEBAPPS_READ_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_WEBAPPS_READ_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite read() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_OTHER_WRITE_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_OTHER_WRITE_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_PLACES_WRITE_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms)"
  },
  "MOZ_SQLITE_PLACES_WRITE_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_COOKIES_WRITE_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_COOKIES_WRITE_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_WEBAPPS_WRITE_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_WEBAPPS_WRITE_MAIN_THREAD_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite write() (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_OTHER_SYNC_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_OTHER_SYNC_MAIN_THREAD_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_PLACES_SYNC_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_PLACES_SYNC_MAIN_THREAD_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_COOKIES_SYNC_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_COOKIES_SYNC_MAIN_THREAD_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_WEBAPPS_SYNC_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_WEBAPPS_SYNC_MAIN_THREAD_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time spent on SQLite fsync() (ms)"
  },
  "MOZ_SQLITE_OTHER_READ_B": {
    "expires_in_version": "default",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite read() (bytes)"
  },
  "MOZ_SQLITE_PLACES_READ_B": {
    "expires_in_version": "40",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite read() (bytes) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_COOKIES_READ_B": {
    "expires_in_version": "40",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite read() (bytes) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_WEBAPPS_READ_B": {
    "expires_in_version": "40",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite read() (bytes) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_PLACES_WRITE_B": {
    "expires_in_version": "40",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite write (bytes) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_COOKIES_WRITE_B": {
    "expires_in_version": "40",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite write (bytes) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_WEBAPPS_WRITE_B": {
    "expires_in_version": "40",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite write (bytes) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_SQLITE_OTHER_WRITE_B": {
    "expires_in_version": "default",
    "kind": "linear",
    "high": 32768,
    "n_buckets": 3,
    "description": "SQLite write (bytes)"
  },
  "MOZ_STORAGE_ASYNC_REQUESTS_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 32768,
    "n_buckets": 20,
    "description": "mozStorage async requests completion (ms) *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "MOZ_STORAGE_ASYNC_REQUESTS_SUCCESS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "40",
    "kind": "boolean",
    "description": "mozStorage async requests success *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "STARTUP_MEASUREMENT_ERRORS": {
    "expires_in_version": "default",
    "kind": "enumerated",
    "n_values": 16,
    "description": "Flags errors in startup calculation()"
  },
  "NETWORK_DISK_CACHE_OPEN": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Time spent opening disk cache (ms)"
  },
  "NETWORK_DISK_CACHE_TRASHRENAME": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Time spent renaming bad Cache to Cache.Trash (ms)"
  },
  "NETWORK_DISK_CACHE_DELETEDIR": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Time spent deleting disk cache (ms)"
  },
  "NETWORK_DISK_CACHE_DELETEDIR_SHUTDOWN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Time spent during showdown stopping thread deleting old disk cache (ms)"
  },
  "NETWORK_DISK_CACHE_SHUTDOWN": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Total Time spent (ms) during disk cache showdown"
  },
  "NETWORK_DISK_CACHE_SHUTDOWN_V2": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Total Time spent (ms) during disk cache showdown [cache2]"
  },
  "NETWORK_DISK_CACHE_SHUTDOWN_CLEAR_PRIVATE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Time spent (ms) during showdown deleting disk cache for 'clear private data' option"
  },
  "NETWORK_DISK_CACHE2_SHUTDOWN_CLEAR_PRIVATE": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 10,
    "description": "Time spent (ms) during showdown deleting disk cache v2 for 'clear private data' option"
  },
  "NETWORK_ID": {
    "alert_emails": ["necko@mozilla.com"],
    "bug_numbers": [1240932],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 6,
    "description": "Network identification (0=None, 1=New, 2=Same)"
  },
  "IDLE_NOTIFY_IDLE_MS": {
    "alert_emails": ["froydnj@mozilla.com"],
    "bug_numbers": [731004],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 10,
    "description": "Time spent checking for and notifying listeners that the user is idle (ms)"
  },
  "URLCLASSIFIER_LOOKUP_TIME_2": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "bug_numbers": [1336376],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 30,
    "description": "Time spent per dbservice lookup (ms)"
  },
  "URLCLASSIFIER_SHUTDOWN_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "58",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "bug_numbers": [1315140],
    "description": "Time spent per dbservice shutdown (ms)"
  },
  "URLCLASSIFIER_CL_CHECK_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 500,
    "n_buckets": 10,
    "description": "Time spent per classifier lookup (ms)"
  },
  "URLCLASSIFIER_CL_KEYED_UPDATE_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "keyed": true,
    "kind": "exponential",
    "low": 20,
    "high": 120000,
    "n_buckets": 30,
    "bug_numbers": [1315893],
    "description": "Time spent per classifier update (ms), keyed by the name of the provider."
  },
  "URLCLASSIFIER_CLASSIFYLOCAL_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "bug_numbers": [1334616],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 30,
    "description": "Time spent inside ClassifyLocalWithTables (ms)"
  },
  "URLCLASSIFIER_ASYNC_CLASSIFYLOCAL_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "bug_numbers": [1341506],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 30,
    "description": "Time spent per AsyncClassifyLocalWithTables (ms)"
  },
  "URLCLASSIFIER_PS_FILELOAD_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 10,
    "description": "Time spent loading PrefixSet from file (ms)"
  },
  "URLCLASSIFIER_PS_FALLOCATE_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 10,
    "description": "Time spent fallocating PrefixSet (ms)"
  },
  "URLCLASSIFIER_PS_CONSTRUCT_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 15,
    "description": "Time spent constructing PrefixSet from DB (ms)"
  },
  "URLCLASSIFIER_VLPS_FILELOAD_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "58",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 10,
    "bug_numbers": [1283007],
    "description": "Time spent loading Variable-Length PrefixSet from file (ms)"
  },
  "URLCLASSIFIER_VLPS_FALLOCATE_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "58",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 10,
    "bug_numbers": [1283007],
    "description": "Time spent fallocating Variable-Length PrefixSet (ms)"
  },
  "URLCLASSIFIER_VLPS_CONSTRUCT_TIME": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "60",
    "kind": "exponential",
    "high": 5000,
    "n_buckets": 15,
    "bug_numbers": [1336865],
    "description": "Time spent constructing Variable-Length PrefixSet from file (ms)"
  },
  "URLCLASSIFIER_VLPS_LOAD_CORRUPT": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "58",
    "kind": "boolean",
    "bug_numbers": [1305581],
    "description": "Whether or not a variable-length prefix set loaded from disk is corrupted (true = file corrupted)."
  },
  "URLCLASSIFIER_LC_PREFIXES": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "high": 1500000,
    "n_buckets": 15,
    "description": "Size of the prefix cache in entries"
  },
  "URLCLASSIFIER_LC_COMPLETIONS": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 200,
    "n_buckets": 10,
    "description": "Size of the completion cache in entries"
  },
  "URLCLASSIFIER_UPDATE_REMOTE_NETWORK_ERROR": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "60",
    "kind": "enumerated",
    "keyed": true,
    "n_values": 30,
    "bug_numbers": [1332780],
    "description": "Network error from SafeBrowsing database updates. (0=sucess, 1=unknown error, 2=already connected, 3=not connected, 4=connection refused,5=net timeout, 6=offline, 7=port access not allowed, 8=net reset, 9=net interrupt, 10=proxy connection refused,11=partial transfer,12=inadequate security,13=unknown host,14=dns lookup queue full,15=unknown proxy host"
  },
  "URLCLASSIFIER_UPDATE_REMOTE_STATUS2": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "keyed": true,
    "n_values": 16,
    "bug_numbers": [1311910],
    "description": "Server HTTP status code from SafeBrowsing database updates. (0=1xx, 1=200, 2=2xx, 3=204, 4=3xx, 5=400, 6=4xx, 7=403, 8=404, 9=408, 10=413, 11=5xx, 12=502|504|511, 13=503, 14=505, 15=Other). Keyed by provider"
  },
  "URLCLASSIFIER_COMPLETE_REMOTE_STATUS2": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "keyed": true,
    "n_values": 16,
    "bug_numbers": [1150921, 1311926],
    "description": "Server HTTP status code from remote SafeBrowsing gethash lookups. (0=1xx, 1=200, 2=2xx, 3=204, 4=3xx, 5=400, 6=4xx, 7=403, 8=404, 9=408, 10=413, 11=5xx, 12=502|504|511, 13=503, 14=505, 15=Other). Keyed by provider"
  },
  "URLCLASSIFIER_COMPLETION_ERROR": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "59",
    "kind": "enumerated",
    "n_values": 16,
    "bug_numbers": [1276826],
    "description": "SafeBrowsing v4 hash completion error (0 = success, 1 = parsing failure, 2 = unknown threat type)"
  },
  "URLCLASSIFIER_COMPLETE_TIMEOUT2": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "59",
    "kind": "boolean",
    "keyed": true,
    "bug_numbers": [1172688, 1311926],
    "description": "This metric is recorded every time a gethash lookup is performed, `true` is recorded if the lookup times out. Keyed by provider"
  },
  "URLCLASSIFIER_UPDATE_ERROR": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "59",
    "kind": "enumerated",
    "keyed": true,
    "n_values": 16,
    "bug_numbers": [1311910],
    "description": "Whether or not an error was encountered while processing a Safe Browsing update (0 = success, 1 = unspecified error, 2 = addition of an already existing prefix, 3 = parser got into an infinite loop, 4 = removal index out of bounds, 5 = checksum mismatch, 6 = missing checksum, 7 = update while shutdown, 8 = cannot find table, 9 = build prefix failure, 10 = write disk failure, 11 = protocol parser error). Keyed by provider"
  },
  "URLCLASSIFIER_PREFIX_MATCH": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "58",
    "kind": "enumerated",
    "n_values": 4,
    "bug_numbers": [1298257],
    "description": "Classifier prefix matching result (0 = no match, 1 = match only V2, 2 = match only V4, 3 = match both V2 and V4)"
  },
  "URLCLASSIFIER_MATCH_RESULT": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "60",
    "kind": "enumerated",
    "n_values": 16,
    "bug_numbers": [1311931],
    "description": "The result of each URL lookup against both google and google4 lists(0 = no match, 1 = V2 prefix only, 2 = V4 prefix only, 3 = V2 and V4 prefixes, 4 = V2 and V4 completions, 5 = V2 completion only, 6 = V4 completion only, 7 = V2 completion and v4 prefix, 8 = V2 prefix and V4 completion, 9 = unexpected result)"
  },
  "URLCLASSIFIER_POSITIVE_CACHE_DURATION": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "60",
    "kind": "exponential",
    "high": 86400000,
    "n_buckets": 50,
    "bug_numbers": [1338082],
    "description": "Positive cache duration (ms) received in fullhash response from any v4 provider"
  },
  "URLCLASSIFIER_NEGATIVE_CACHE_DURATION": {
    "alert_emails": ["safebrowsing-telemetry@mozilla.org"],
    "expires_in_version": "60",
    "kind": "exponential",
    "high": 86400000,
    "n_buckets": 50,
    "bug_numbers": [1338082],
    "description": "Negative cache duration (ms) received in fullhash response from any v4 provider"
  },
  "CSP_DOCUMENTS_COUNT": {
    "alert_emails": ["seceng@mozilla.com"],
    "bug_numbers": [1252829],
    "expires_in_version": "55",
    "kind": "count",
    "description": "Number of unique pages that contain a CSP"
  },
  "CSP_UNSAFE_INLINE_DOCUMENTS_COUNT": {
    "alert_emails": ["seceng@mozilla.com"],
    "bug_numbers": [1252829],
    "expires_in_version": "55",
    "kind": "count",
    "description": "Number of unique pages that contain an unsafe-inline CSP directive"
  },
  "CSP_UNSAFE_EVAL_DOCUMENTS_COUNT": {
    "alert_emails": ["seceng@mozilla.com"],
    "bug_numbers": [1252829],
    "expires_in_version": "55",
    "kind": "count",
    "description": "Number of unique pages that contain an unsafe-eval CSP directive"
  },
  "CSP_REFERRER_DIRECTIVE": {
    "alert_emails": ["seceng-telemetry@mozilla.com"],
    "bug_numbers": [1303685],
    "expires_in_version": "56",
    "kind": "boolean",
    "description": "Whether a document with a CSP policy (report-only or enforcing) contains a referrer directive ('true') or not ('false')."
  },
  "PLACES_PAGES_COUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1000,
    "high": 150000,
    "n_buckets": 20,
    "releaseChannelCollection": "opt-out",
    "description": "PLACES: Number of unique pages"
  },
  "PLACES_MOST_RECENT_EXPIRED_VISIT_DAYS": {
    "alert_emails": ["firefox-dev@mozilla.org"],
    "expires_in_version": "never",
    "kind": "linear",
    "low": 30,
    "high": 730,
    "n_buckets": 12,
    "description": "PLACES: the most recent expired visit in days"
  },
  "PLACES_BOOKMARKS_COUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 100,
    "high": 8000,
    "n_buckets": 15,
    "releaseChannelCollection": "opt-out",
    "description": "PLACES: Number of bookmarks"
  },
  "PLACES_TAGS_COUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 200,
    "n_buckets": 10,
    "description": "PLACES: Number of tags"
  },
  "PLACES_KEYWORDS_COUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 200,
    "n_buckets": 10,
    "description": "PLACES: Number of keywords"
  },
  "PLACES_BACKUPS_DAYSFROMLAST": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 15,
    "description": "PLACES: Days from last backup"
  },
  "PLACES_BACKUPS_BOOKMARKSTREE_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 2000,
    "n_buckets": 10,
    "description": "PLACES: Time to build the bookmarks tree"
  },
  "PLACES_BACKUPS_TOJSON_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "low": 50,
    "high": 2000,
    "n_buckets": 10,
    "description": "PLACES: Time to convert and write the backup"
  },
  "PLACES_EXPORT_TOHTML_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 2000,
    "n_buckets": 10,
    "description": "PLACES: Time to convert and write bookmarks.html"
  },
  "PLACES_FAVICON_ICO_SIZES": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "high": 524288,
    "n_buckets" : 100,
    "description": "PLACES: Size of the ICO favicon files loaded from the web (Bytes)"
  },
  "PLACES_FAVICON_PNG_SIZES": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "high": 524288,
    "n_buckets" : 100,
    "description": "PLACES: Size of the PNG favicon files loaded from the web (Bytes)"
  },
  "PLACES_FAVICON_GIF_SIZES": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "high": 524288,
    "n_buckets" : 100,
    "description": "PLACES: Size of the GIF favicon files loaded from the web (Bytes)"
  },
  "PLACES_FAVICON_JPEG_SIZES": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "high": 524288,
    "n_buckets" : 100,
    "description": "PLACES: Size of the JPEG favicon files loaded from the web (Bytes)"
  },
  "PLACES_FAVICON_BMP_SIZES": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "high": 524288,
    "n_buckets" : 100,
    "description": "PLACES: Size of the BMP favicon files loaded from the web (Bytes)"
  },
  "PLACES_FAVICON_SVG_SIZES": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "high": 524288,
    "n_buckets" : 100,
    "description": "PLACES: Size of the SVG favicon files loaded from the web (Bytes)"
  },
  "PLACES_FAVICON_OTHER_SIZES": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "high": 524288,
    "n_buckets" : 100,
    "description": "PLACES: Size of favicon files without a specific file type probe, loaded from the web (Bytes)"
  },
  "LINK_ICON_SIZES_ATTR_USAGE": {
    "expires_in_version" : "never",
    "kind": "enumerated",
    "n_values": 4,
    "description": "The possible types of the 'sizes' attribute for <link rel=icon>. 0: Attribute not specified, 1: 'any', 2: Integer dimensions, 3: Invalid value."
  },
  "LINK_ICON_SIZES_ATTR_DIMENSION": {
    "expires_in_version" : "never",
    "kind": "linear",
    "high": 513,
    "n_buckets" : 64,
    "description": "The width dimension of the 'sizes' attribute for <link rel=icon>."
  },
  "FENNEC_DISTRIBUTION_REFERRER_INVALID": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the referrer intent specified an invalid distribution name",
    "cpp_guard": "ANDROID"
  },
  "FENNEC_DISTRIBUTION_CODE_CATEGORY": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "description": "First digit of HTTP result code, or error category, during distribution download",
    "cpp_guard": "ANDROID"
  },
  "FENNEC_DISTRIBUTION_DOWNLOAD_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 100,
    "high": 40000,
    "n_buckets": 30,
    "description": "Time taken to download a specified distribution file (msec)",
    "cpp_guard": "ANDROID"
  },
  "FENNEC_BOOKMARKS_COUNT": {
    "expires_in_version": "60",
    "kind": "exponential",
    "high": 8000,
    "n_buckets": 20,
    "description": "Number of bookmarks stored in the browser DB",
    "alert_emails": ["mobile-frontend@mozilla.com"],
    "bug_numbers": [1244704]
  },
  "FENNEC_ORBOT_INSTALLED": {
    "expires_in_version": "60",
    "kind": "flag",
    "cpp_guard": "ANDROID",
    "description": "Whether or not users have Orbot installed",
    "alert_emails": ["seceng@mozilla.org"],
    "bug_numbers": [1314784]
  },
  "FENNEC_READING_LIST_COUNT": {
    "expires_in_version": "50",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 10,
    "cpp_guard": "ANDROID",
    "description": "Number of reading list items stored in the browser DB *** No longer needed (bug 1156565). Delete histogram and accumulation code! ***"
  },
  "FENNEC_READER_VIEW_CACHE_SIZE": {
    "expires_in_version": "60",
    "alert_emails": ["mobile-frontend@mozilla.com"],
    "kind": "exponential",
    "low": 32,
    "high": 51200,
    "n_buckets": 20,
    "description": "Total disk space used by items in the reader view cache (KB)",
    "bug_numbers": [1246159]
  },
  "FENNEC_LOOP_UI_LATENCY": {
    "expires_in_version": "55",
    "alert_emails": ["mobile-platform@mozilla.org"],
    "kind": "exponential",
    "low": 10,
    "high": 10485760,
    "n_buckets": 22,
    "description": "Latency in microseconds of UI events in the Android event loop between posting and processing",
    "bug_numbers": [1322574],
    "cpp_guard": "MOZ_WIDGET_ANDROID"
  },
  "FENNEC_LOOP_OTHER_LATENCY": {
    "expires_in_version": "55",
    "alert_emails": ["mobile-platform@mozilla.org"],
    "kind": "exponential",
    "low": 10,
    "high": 10485760,
    "n_buckets": 22,
    "description": "Latency in microseconds of non-UI events in the Android event loop between posting and processing",
    "bug_numbers": [1322574],
    "cpp_guard": "MOZ_WIDGET_ANDROID"
  },
  "PLACES_SORTED_BOOKMARKS_PERC": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 10,
    "description": "PLACES: Percentage of bookmarks organized in folders"
  },
  "PLACES_TAGGED_BOOKMARKS_PERC": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 10,
    "description": "PLACES: Percentage of tagged bookmarks"
  },
  "PLACES_DATABASE_FILESIZE_MB": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 5,
    "high": 200,
    "n_buckets": 10,
    "description": "PLACES: Database filesize (MB)"
  },
  "PLACES_DATABASE_PAGESIZE_B": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1024,
    "high": 32768,
    "n_buckets": 10,
    "description": "PLACES: Database page size (bytes)"
  },
  "PLACES_DATABASE_SIZE_PER_PAGE_B": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 500,
    "high": 10240,
    "n_buckets": 20,
    "description": "PLACES: Average size of a place in the database (bytes)"
  },
  "PLACES_EXPIRATION_STEPS_TO_CLEAN2": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 10,
    "description": "PLACES: Expiration steps to cleanup the database"
  },
  "PLACES_AUTOCOMPLETE_1ST_RESULT_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 500,
    "n_buckets": 10,
    "description": "PLACES: Time for first autocomplete result if > 50ms (ms)"
  },
  "PLACES_AUTOCOMPLETE_6_FIRST_RESULTS_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 1000,
    "n_buckets": 30,
    "description": "PLACES: Time for the 6 first autocomplete results (ms)"
  },
  "HISTORY_LASTVISITED_TREE_QUERY_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 2000,
    "n_buckets": 30,
    "description": "PLACES: Time to load the sidebar history tree sorted by last visit (ms)"
  },
  "PLACES_HISTORY_LIBRARY_SEARCH_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 1000,
    "n_buckets": 30,
    "description": "PLACES: Time to search the history library (ms)"
  },
  "PLACES_AUTOCOMPLETE_URLINLINE_DOMAIN_QUERY_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 2000,
    "n_buckets": 10,
    "description": "PLACES: Duration of the domain query for the url inline autocompletion (ms)"
  },
  "PLACES_IDLE_FRECENCY_DECAY_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 10000,
    "n_buckets": 10,
    "description": "PLACES: Time to decay all frecencies values on idle (ms)"
  },
  "PLACES_IDLE_MAINTENANCE_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 1000,
    "high": 30000,
    "n_buckets": 10,
    "description": "PLACES: Time to execute maintenance tasks on idle (ms)"
  },
  "PLACES_ANNOS_BOOKMARKS_COUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 5000,
    "n_buckets": 10,
    "description": "PLACES: Number of bookmarks annotations"
  },
  "PLACES_ANNOS_PAGES_COUNT": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 5000,
    "n_buckets": 10,
    "description": "PLACES: Number of pages annotations"
  },
  "PLACES_MAINTENANCE_DAYSFROMLAST": {
    "expires_in_version" : "never",
    "kind": "exponential",
    "low": 7,
    "high": 60,
    "n_buckets" : 10,
    "description": "PLACES: Days from last maintenance"
  },
  "UPDATE_CHECK_NO_UPDATE_EXTERNAL" : {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of no updates were found for a background update check (externally initiated)"
  },
  "UPDATE_CHECK_NO_UPDATE_NOTIFY" : {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of no updates were found for a background update check (timer initiated)"
  },
  "UPDATE_CHECK_CODE_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 50,
    "releaseChannelCollection": "opt-out",
    "description": "Update: background update check result code except for no updates found (externally initiated)"
  },
  "UPDATE_CHECK_CODE_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 50,
    "releaseChannelCollection": "opt-out",
    "description": "Update: background update check result code except for no updates found (timer initiated)"
  },
  "UPDATE_CHECK_EXTENDED_ERROR_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "keyed": true,
    "releaseChannelCollection": "opt-out",
    "description": "Update: keyed count (key names are prefixed with AUS_CHECK_EX_ERR_) of background update check extended error code (externally initiated)"
  },
  "UPDATE_CHECK_EXTENDED_ERROR_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "keyed": true,
    "releaseChannelCollection": "opt-out",
    "description": "Update: keyed count (key names are prefixed with AUS_CHECK_EX_ERR_) of background update check extended error code (timer initiated)"
  },
  "UPDATE_INVALID_LASTUPDATETIME_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that have a last update time greater than the current time (externally initiated)"
  },
  "UPDATE_INVALID_LASTUPDATETIME_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that have a last update time greater than the current time (timer initiated)"
  },
  "UPDATE_LAST_NOTIFY_INTERVAL_DAYS_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "n_buckets": 60,
    "high": 365,
    "releaseChannelCollection": "opt-out",
    "description": "Update: interval in days since the last background update check (externally initiated)"
  },
  "UPDATE_LAST_NOTIFY_INTERVAL_DAYS_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "n_buckets": 30,
    "high": 180,
    "releaseChannelCollection": "opt-out",
    "description": "Update: interval in days since the last background update check (timer initiated)"
  },
  "UPDATE_PING_COUNT_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems for this ping for comparison with other pings (externally initiated)"
  },
  "UPDATE_PING_COUNT_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems for this ping for comparison with other pings (timer initiated)"
  },
  "UPDATE_SERVICE_INSTALLED_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "boolean",
    "releaseChannelCollection": "opt-out",
    "description": "Update: whether the service is installed (externally initiated)"
  },
  "UPDATE_SERVICE_INSTALLED_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "boolean",
    "releaseChannelCollection": "opt-out",
    "description": "Update: whether the service is installed (timer initiated)"
  },
  "UPDATE_SERVICE_MANUALLY_UNINSTALLED_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that manually uninstalled the service (externally initiated)"
  },
  "UPDATE_SERVICE_MANUALLY_UNINSTALLED_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that manually uninstalled the service (timer initiated)"
  },
  "UPDATE_UNABLE_TO_APPLY_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that cannot apply updates (externally initiated)"
  },
  "UPDATE_UNABLE_TO_APPLY_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that cannot apply updates (timer initiated)"
  },
  "UPDATE_CANNOT_STAGE_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that cannot stage updates (externally initiated)"
  },
  "UPDATE_CANNOT_STAGE_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of systems that cannot stage updates (timer initiated)"
  },
  "UPDATE_PREF_UPDATE_CANCELATIONS_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: number of sequential update elevation request cancelations greater than 0 (externally initiated)"
  },
  "UPDATE_PREF_UPDATE_CANCELATIONS_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: number of sequential update elevation request cancelations greater than 0 (timer initiated)"
  },
  "UPDATE_PREF_SERVICE_ERRORS_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 30,
    "releaseChannelCollection": "opt-out",
    "description": "Update: number of sequential update service errors greater than 0 (externally initiated)"
  },
  "UPDATE_PREF_SERVICE_ERRORS_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 30,
    "releaseChannelCollection": "opt-out",
    "description": "Update: number of sequential update service errors greater than 0 (timer initiated)"
  },
  "UPDATE_NOT_PREF_UPDATE_AUTO_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.auto boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_NOT_PREF_UPDATE_AUTO_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.auto boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_NOT_PREF_UPDATE_ENABLED_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.enabled boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_NOT_PREF_UPDATE_ENABLED_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.enabled boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_NOT_PREF_UPDATE_STAGING_ENABLED_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.staging.enabled boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_NOT_PREF_UPDATE_STAGING_ENABLED_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.staging.enabled boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_NOT_PREF_UPDATE_SERVICE_ENABLED_EXTERNAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.service.enabled boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_NOT_PREF_UPDATE_SERVICE_ENABLED_NOTIFY": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "count",
    "releaseChannelCollection": "opt-out",
    "description": "Update: count of when the app.update.service.enabled boolean preference is not the default value of true (true values are not submitted)"
  },
  "UPDATE_DOWNLOAD_CODE_COMPLETE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 50,
    "releaseChannelCollection": "opt-out",
    "description": "Update: complete patch download result code"
  },
  "UPDATE_DOWNLOAD_CODE_PARTIAL": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 50,
    "releaseChannelCollection": "opt-out",
    "description": "Update: complete patch download result code"
  },
  "UPDATE_STATE_CODE_COMPLETE_STARTUP": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the state of a complete update from update.status on startup"
  },
  "UPDATE_STATE_CODE_PARTIAL_STARTUP": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the state of a partial patch update from update.status on startup"
  },
  "UPDATE_STATE_CODE_UNKNOWN_STARTUP": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the state of an unknown patch update from update.status on startup"
  },
  "UPDATE_STATE_CODE_COMPLETE_STAGE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the state of a complete patch update from update.status after staging"
  },
  "UPDATE_STATE_CODE_PARTIAL_STAGE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the state of a partial patch update from update.status after staging"
  },
  "UPDATE_STATE_CODE_UNKNOWN_STAGE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the state of an unknown patch update from update.status after staging"
  },
  "UPDATE_STATUS_ERROR_CODE_COMPLETE_STARTUP": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the status error code for a failed complete patch update from update.status on startup"
  },
  "UPDATE_STATUS_ERROR_CODE_PARTIAL_STARTUP": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the status error code for a failed partial patch update from update.status on startup"
  },
  "UPDATE_STATUS_ERROR_CODE_UNKNOWN_STARTUP": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the status error code for a failed unknown patch update from update.status on startup"
  },
  "UPDATE_STATUS_ERROR_CODE_COMPLETE_STAGE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the status error code for a failed complete patch update from update.status after staging"
  },
  "UPDATE_STATUS_ERROR_CODE_PARTIAL_STAGE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the status error code for a failed partial patch update from update.status after staging"
  },
  "UPDATE_STATUS_ERROR_CODE_UNKNOWN_STAGE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the status error code for a failed unknown patch update from update.status after staging"
  },
  "UPDATE_WIZ_LAST_PAGE_CODE": {
    "alert_emails": ["application-update-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 30,
    "releaseChannelCollection": "opt-out",
    "description": "Update: the update wizard page displayed when the UI was closed (mapped in toolkit/mozapps/update/UpdateTelemetry.jsm)"
  },
  "THUNDERBIRD_GLODA_SIZE_MB": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 1000,
    "n_buckets": 40,
    "description": "Gloda: size of global-messages-db.sqlite (MB)"
  },
  "THUNDERBIRD_CONVERSATIONS_TIME_TO_2ND_GLODA_QUERY_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 30,
    "description": "Conversations: time between the moment we click and the second gloda query returns (ms)"
  },
  "THUNDERBIRD_INDEXING_RATE_MSG_PER_S": {
    "expires_in_version": "never",
    "kind": "linear",
    "high": 100,
    "n_buckets": 20,
    "description": "Gloda: indexing rate (message/s)"
  },
  "FX_GESTURE_INSTALL_SNAPSHOT_OF_PAGE": {
    "expires_in_version": "50",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 30,
    "description": "Firefox: Time taken to store the image capture of the page to a canvas, for reuse while swiping through history (ms)."
  },
  "FX_GESTURE_COMPRESS_SNAPSHOT_OF_PAGE": {
    "expires_in_version": "50",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 30,
    "description": "Firefox: Time taken to kick off image compression of the canvas that will be used during swiping through history (ms)."
  },
  "FX_TAB_ANIM_OPEN_PREVIEW_FRAME_INTERVAL_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 7,
    "high": 500,
    "n_buckets": 50,
    "description": "Average frame interval during tab open animation of about:newtab (preview=on), when other tabs are unaffected"
  },
  "FX_TAB_ANIM_OPEN_FRAME_INTERVAL_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 7,
    "high": 500,
    "n_buckets": 50,
    "description": "Average frame interval during tab open animation of about:newtab (preview=off), when other tabs are unaffected"
  },
  "FX_TAB_ANIM_ANY_FRAME_INTERVAL_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 7,
    "high": 500,
    "n_buckets": 50,
    "description": "Average frame interval during any tab open/close animation (excluding tabstrip scroll)"
  },
  "FX_REFRESH_DRIVER_CHROME_FRAME_DELAY_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "bug_numbers": [1220699],
    "description": "Delay in ms between the target and the actual handling time of the frame at refresh driver in the chrome process."
  },
  "FX_REFRESH_DRIVER_CONTENT_FRAME_DELAY_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "bug_numbers": [1221674],
    "description": "Delay in ms between the target and the actual handling time of the frame at refresh driver in the content process."
  },
  "FX_REFRESH_DRIVER_SYNC_SCROLL_FRAME_DELAY_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "bug_numbers": [1228147],
    "description": "Delay in ms between the target and the actual handling time of the frame at refresh driver while scrolling synchronously."
  },
  "FX_TAB_SWITCH_UPDATE_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 20,
    "description": "Firefox: Time in ms spent updating UI in response to a tab switch"
  },
  "FX_TAB_SWITCH_TOTAL_MS": {
    "expires_in_version": "56",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Firefox: Time in ms till a tab switch is complete including the first paint"
  },
  "FX_TAB_SWITCH_TOTAL_E10S_MS": {
    "expires_in_version": "56",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Firefox: Time in ms between tab selection and tab content paint."
  },
  "FX_TAB_SWITCH_SPINNER_VISIBLE_MS": {
    "expires_in_version": "56",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 20,
    "releaseChannelCollection": "opt-out",
    "description": "Firefox: If the spinner interstitial displays during tab switching, records the time in ms the graphic is visible"
  },
  "FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS": {
    "expires_in_version": "56",
    "kind": "exponential",
    "low": 1000,
    "high": 64000,
    "n_buckets": 7,
    "bug_numbers": [1301104],
    "alert_emails": ["mconley@mozilla.com"],
    "releaseChannelCollection": "opt-out",
    "description": "Firefox: If the spinner interstitial displays during tab switching, records the time in ms the graphic is visible. This probe is similar to FX_TAB_SWITCH_SPINNER_VISIBLE_MS, but is for truly degenerate cases."
  },
  "FX_TAB_CLICK_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 20,
    "description": "Firefox: Time in ms spent on switching tabs in response to a tab click"
  },
  "FX_BOOKMARKS_TOOLBAR_INIT_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "low": 50,
    "high": 5000,
    "n_buckets": 10,
    "description": "Firefox: Time to initialize the bookmarks toolbar view (ms)"
  },
  "FX_BROWSER_FULLSCREEN_USED": {
    "expires_in_version": "46",
    "kind": "count",
    "description": "The number of times that a session enters browser fullscreen (f11-fullscreen)"
  },
  "FX_NEW_WINDOW_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 20,
    "description": "Firefox: Time taken to open a new browser window (ms)"
  },
  "FX_PAGE_LOAD_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 20,
    "description": "Firefox: Time taken to load a page (ms). This includes all static contents, no dynamic content. Loading of about: pages is not counted."
  },
  "FX_TOTAL_TOP_VISITS": {
    "expires_in_version": "default",
    "kind": "boolean",
    "description": "Count the number of times a new top page was starting to load"
  },
  "FX_THUMBNAILS_CAPTURE_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 500,
    "n_buckets": 15,
    "description": "THUMBNAILS: Time (ms) it takes to capture a thumbnail"
  },
  "FX_THUMBNAILS_STORE_TIME_MS": {
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 500,
    "n_buckets": 15,
    "description": "THUMBNAILS: Time (ms) it takes to store a thumbnail in the cache"
  },
  "FX_THUMBNAILS_HIT_OR_MISS": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "THUMBNAILS: Thumbnail found"
  },
  "FX_MIGRATION_ENTRY_POINT": {
    "bug_numbers": [731025],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "n_values": 10,
    "releaseChannelCollection": "opt-out",
    "description": "Where the migration wizard was entered from. 0=Other/catch-all, 1=first-run, 2=refresh-firefox, 3=Places window, 4=Password manager"
  },
  "FX_MIGRATION_SOURCE_BROWSER": {
    "bug_numbers": [731025],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "n_values": 15,
    "releaseChannelCollection": "opt-out",
    "description": "The browser that data is pulled from. The values correspond to the internal browser ID (see MigrationUtils.jsm)"
  },
  "FX_MIGRATION_ERRORS": {
    "bug_numbers": [731025],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "keyed": true,
    "n_values": 12,
    "releaseChannelCollection": "opt-out",
    "description": "Errors encountered during migration in buckets defined by the datatype, keyed by the string description of the browser."
  },
  "FX_MIGRATION_USAGE": {
    "bug_numbers": [731025],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "keyed": true,
    "n_values": 12,
    "releaseChannelCollection": "opt-out",
    "description": "Usage of migration for each datatype when migration is run through the post-firstrun flow which allows individual datatypes, keyed by the string description of the browser."
  },
  "FX_MIGRATION_IMPORTED_HOMEPAGE": {
    "bug_numbers": [731025, 1298208],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "boolean",
    "keyed": true,
    "releaseChannelCollection": "opt-out",
    "description": "Whether the homepage was imported during browser migration. Only available on release builds during firstrun."
  },
  "FX_MIGRATION_BOOKMARKS_IMPORT_MS": {
    "bug_numbers": [1289436],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "exponential",
    "n_buckets": 70,
    "high": 100000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "How long it took to import bookmarks from another browser, keyed by the name of the browser."
  },
  "FX_MIGRATION_HISTORY_IMPORT_MS": {
    "bug_numbers": [1289436],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "exponential",
    "n_buckets": 70,
    "high": 100000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "How long it took to import history from another browser, keyed by the name of the browser."
  },
  "FX_MIGRATION_LOGINS_IMPORT_MS": {
    "bug_numbers": [1289436],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "exponential",
    "n_buckets": 70,
    "high": 100000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "How long it took to import logins (passwords) from another browser, keyed by the name of the browser."
  },
  "FX_MIGRATION_BOOKMARKS_JANK_MS": {
    "bug_numbers": [1338522],
    "alert_emails": ["dao@mozilla.com"],
    "expires_in_version": "58",
    "kind": "exponential",
    "n_buckets": 20,
    "high": 60000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "Accumulated timer delay (variance between when the timer was expected to fire and when it actually fired) in milliseconds as an indicator for decreased main-thread responsiveness while importing bookmarks from another browser, keyed by the name of the browser (see gAvailableMigratorKeys in MigrationUtils.jsm). The import is happening on a background thread and should ideally not affect the UI noticeably."
  },
  "FX_MIGRATION_HISTORY_JANK_MS": {
    "bug_numbers": [1338522],
    "alert_emails": ["dao@mozilla.com"],
    "expires_in_version": "58",
    "kind": "exponential",
    "n_buckets": 20,
    "high": 60000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "Accumulated timer delay (variance between when the timer was expected to fire and when it actually fired) in milliseconds as an indicator for decreased main-thread responsiveness while importing history from another browser, keyed by the name of the browser (see gAvailableMigratorKeys in MigrationUtils.jsm). The import is happening on a background thread and should ideally not affect the UI noticeably."
  },
  "FX_MIGRATION_LOGINS_JANK_MS": {
    "bug_numbers": [1338522],
    "alert_emails": ["dao@mozilla.com"],
    "expires_in_version": "58",
    "kind": "exponential",
    "n_buckets": 20,
    "high": 60000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "Accumulated timer delay (variance between when the timer was expected to fire and when it actually fired) in milliseconds as an indicator for decreased main-thread responsiveness while importing logins / passwords from another browser, keyed by the name of the browser (see gAvailableMigratorKeys in MigrationUtils.jsm). The import is happening on a background thread and should ideally not affect the UI noticeably."
  },
  "FX_MIGRATION_BOOKMARKS_QUANTITY": {
    "bug_numbers": [1279501],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "exponential",
    "n_buckets": 20,
    "high": 1000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "How many bookmarks we imported from another browser, keyed by the name of the browser."
  },
  "FX_MIGRATION_HISTORY_QUANTITY": {
    "bug_numbers": [1279501],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "exponential",
    "n_buckets": 40,
    "high": 10000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "How many history visits we imported from another browser, keyed by the name of the browser."
  },
  "FX_MIGRATION_LOGINS_QUANTITY": {
    "bug_numbers": [1279501],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "exponential",
    "n_buckets": 20,
    "high": 1000,
    "releaseChannelCollection": "opt-out",
    "keyed": true,
    "description": "How many logins (passwords) we imported from another browser, keyed by the name of the browser."
  },
  "FX_STARTUP_MIGRATION_BROWSER_COUNT": {
    "bug_numbers": [1275114],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "n_values": 15,
    "releaseChannelCollection": "opt-out",
    "description": "Number of browsers from which the user could migrate on initial profile migration. Only available on release builds during firstrun."
  },
  "FX_STARTUP_MIGRATION_EXISTING_DEFAULT_BROWSER": {
    "bug_numbers": [1275114],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "n_values": 15,
    "releaseChannelCollection": "opt-out",
    "description": "The browser that was the default on the initial profile migration. The values correspond to the internal browser ID (see MigrationUtils.jsm)"
  },
  "FX_STARTUP_MIGRATION_AUTOMATED_IMPORT_PROCESS_SUCCESS": {
    "bug_numbers": [1271775],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "n_values": 27,
    "releaseChannelCollection": "opt-out",
    "description": "Where automatic migration was attempted, indicates to what degree we succeeded. Values 0-25 indicate progress through the automatic migration sequence, with 25 indicating the migration finished. 26 is only used when the migration produced errors before it finished."
  },
  "FX_STARTUP_MIGRATION_AUTOMATED_IMPORT_UNDO": {
    "bug_numbers": [1283565],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "n_values": 31,
    "releaseChannelCollection": "opt-out",
    "description": "Where undo of the automatic migration was attempted, indicates to what degree we succeeded to undo. 0 means we started to undo, 5 means we bailed out from the undo because it was not possible to complete it (there was nothing to undo or the user was signed in to sync). All higher values indicate progression through the undo sequence, with 30 indicating we finished the undo without exceptions in the middle."
  },
  "FX_STARTUP_MIGRATION_UNDO_REASON": {
    "bug_numbers": [1289906],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "keyed": true,
    "kind": "enumerated",
    "n_values": 10,
    "releaseChannelCollection": "opt-out",
    "description": "Why the undo functionality of an automatic migration was disabled: 0 means we used undo, 1 means the user signed in to sync, 2 means the user created/modified a password, 3 means the user created/modified a bookmark (item or folder), 4 means we showed an undo option repeatedly and the user did not use it, 5 means we showed an undo option and the user actively elected to keep the data. The whole thing is keyed to the identifiers of different browsers (so 'chrome', 'ie', 'edge', 'safari', etc.)."
  },
  "FX_STARTUP_MIGRATION_UNDO_OFFERED": {
    "bug_numbers": [1309617],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "kind": "enumerated",
    "n_values": 5,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates we showed a 'would you like to undo this automatic migration?' notification bar. The bucket indicates which nth day we're on (1st/2nd/3rd, by default - 0 would be indicative the pref didn't get set which shouldn't happen). After 3 days on which the notification gets shown, it will get disabled and never shown again."
  },
  "FX_STARTUP_MIGRATION_UNDO_BOOKMARKS_ERRORCOUNT": {
    "bug_numbers": [1333233],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "58",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 20,
    "high": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates how many errors we find when trying to 'undo' bookmarks import. Keys are internal ids of browsers we import from, e.g. 'chrome' or 'ie', etc."
  },
  "FX_STARTUP_MIGRATION_UNDO_LOGINS_ERRORCOUNT": {
    "bug_numbers": [1333233],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "58",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 20,
    "high": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates how many errors we find when trying to 'undo' login (password) import. Keys are internal ids of browsers we import from, e.g. 'chrome' or 'ie', etc."
  },
  "FX_STARTUP_MIGRATION_UNDO_VISITS_ERRORCOUNT": {
    "bug_numbers": [1333233],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "58",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 20,
    "high": 100,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates how many errors we find when trying to 'undo' history import. Keys are internal ids of browsers we import from, e.g. 'chrome' or 'ie', etc."
  },
  "FX_STARTUP_MIGRATION_UNDO_BOOKMARKS_MS": {
    "bug_numbers": [1333233],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "58",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 20,
    "high": 60000,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates how long it took to undo the startup import of bookmarks, in ms. Keys are internal ids of browsers we import from, e.g. 'chrome' or 'ie', etc."
  },
  "FX_STARTUP_MIGRATION_UNDO_LOGINS_MS": {
    "bug_numbers": [1333233],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "58",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 20,
    "high": 60000,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates how long it took to undo the startup import of logins, in ms. Keys are internal ids of browsers we import from, e.g. 'chrome' or 'ie', etc."
  },
  "FX_STARTUP_MIGRATION_UNDO_VISITS_MS": {
    "bug_numbers": [1333233],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "58",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 20,
    "high": 60000,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates how long it took to undo the startup import of visits (history), in ms. Keys are internal ids of browsers we import from, e.g. 'chrome' or 'ie', etc."
  },
  "FX_STARTUP_MIGRATION_UNDO_TOTAL_MS": {
    "bug_numbers": [1333233],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "58",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 20,
    "high": 60000,
    "releaseChannelCollection": "opt-out",
    "description": "Indicates how long it took to undo the entirety of the startup undo, in ms. Keys are internal ids of browsers we import from, e.g. 'chrome' or 'ie', etc."
  },
  "FX_STARTUP_MIGRATION_DATA_RECENCY": {
    "bug_numbers": [1276694],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "keyed": true,
    "kind": "exponential",
    "n_buckets": 50,
    "high": 8760,
    "releaseChannelCollection": "opt-out",
    "description": "The 'last modified' time of the data we imported on the initial profile migration (time delta with 'now' at the time of migration, in hours). Collected for all browsers for which migration data is available, and stored keyed by browser identifier (e.g. 'ie', 'edge', 'safari', etc.)."
  },
  "FX_STARTUP_MIGRATION_USED_RECENT_BROWSER": {
    "bug_numbers": [1276694],
    "alert_emails": ["gijs@mozilla.com"],
    "expires_in_version": "57",
    "keyed": true,
    "kind": "boolean",
    "releaseChannelCollection": "opt-out",
    "description": "Whether the browser we migrated from was the browser with the most recent data. Keyed by that browser's identifier (e.g. 'ie', 'edge', 'safari', etc.)."
  },
  "FX_PREFERENCES_CATEGORY_OPENED": {
    "bug_numbers": [1324167],
    "alert_emails": ["jaws@mozilla.com"],
    "expires_in_version": "56",
    "kind": "categorical",
    "labels": ["unknown", "general", "search", "content", "applications", "privacy", "security", "sync", "advancedGeneral", "advancedDataChoices", "advancedNetwork", "advancedUpdates", "advancedCerts"],
    "releaseChannelCollection": "opt-out",
    "description": "Count how often each preference category is opened."
  },
  "INPUT_EVENT_RESPONSE_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1235908],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time (ms) from the Input event being created to the end of it being handled"
  },
  "LOAD_INPUT_EVENT_RESPONSE_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1298101],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 10000,
    "n_buckets": 50,
    "description": "Time (ms) from the Input event being created to the end of it being handled for events handling during page load only"
  },
  "EVENTLOOP_UI_ACTIVITY_EXP_MS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "bug_numbers": [1198196],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 60000,
    "n_buckets": 50,
    "description": "Widget: Time it takes for the message before a UI message (ms)"
  },
  "FX_SESSION_RESTORE_STARTUP_INIT_SESSION_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 20,
    "description": "Session restore: Time it takes to prepare the data structures for restoring a session (ms)"
  },
  "FX_SESSION_RESTORE_STARTUP_ONLOAD_INITIAL_WINDOW_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 20,
    "description": "Session restore: Time it takes to finish restoration once we have first opened a window (ms)"
  },
  "FX_SESSION_RESTORE_COLLECT_ALL_WINDOWS_DATA_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "Session restore: Time to collect all window data (ms)"
  },
  "FX_SESSION_RESTORE_COLLECT_COOKIES_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "Session restore: Time to collect cookies (ms)"
  },
  "FX_SESSION_RESTORE_COLLECT_DATA_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "Session restore: Time to collect all window and tab data (ms)"
  },
  "FX_SESSION_RESTORE_COLLECT_DATA_LONGEST_OP_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "Session restore: Duration of the longest uninterruptible operation while collecting all window and tab data (ms)"
  },
  "FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_LONGEST_OP_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 30000,
    "n_buckets": 10,
    "description": "Session restore: Duration of the longest uninterruptible operation while collecting data in the content process (ms)"
  },
  "FX_SESSION_RESTORE_SERIALIZE_DATA_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 1000,
    "n_buckets": 10,
    "description": "Session restore: Time to JSON serialize session data (ms)"
  },
  "FX_SESSION_RESTORE_READ_FILE_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Session restore: Time to read the session data from the file on disk (ms)"
  },
  "FX_SESSION_RESTORE_WRITE_FILE_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Session restore: Time to write the session data to the file on disk (ms)"
  },
  "FX_SESSION_RESTORE_FILE_SIZE_BYTES": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 50000000,
    "n_buckets": 30,
    "description": "Session restore: The size of file sessionstore.js (bytes)"
  },
  "FX_SESSION_RESTORE_CORRUPT_FILE": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "boolean",
    "description": "Session restore: Whether the file read on startup contained parse-able JSON"
  },
  "FX_SESSION_RESTORE_ALL_FILES_CORRUPT": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "boolean",
    "description": "Session restore: Whether none of the backup files contained parse-able JSON"
  },
  "FX_SESSION_RESTORE_RESTORE_WINDOW_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Session restore: Time spent blocking the main thread while restoring a window state (ms)"
  },
  "FX_SESSION_RESTORE_SEND_UPDATE_CAUSED_OOM": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "count",
    "description": "Count of messages sent by SessionRestore from child frames to the parent and that cannot be transmitted as they eat up too much memory."
  },
  "FX_SESSION_RESTORE_DOM_STORAGE_SIZE_ESTIMATE_CHARS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 30000000,
    "n_buckets": 20,
    "description": "Session restore: Number of characters in DOM Storage for a tab. Pages without DOM Storage or with an empty DOM Storage are ignored."
  },
  "FX_SESSION_RESTORE_AUTO_RESTORE_DURATION_UNTIL_EAGER_TABS_RESTORED_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "low": 100,
    "high": 100000,
    "n_buckets": 20,
    "description": "Session restore: If the browser is setup to auto-restore tabs, this probe measures the time elapsed between the instant we start Session Restore and the instant we have finished restoring tabs eagerly. At this stage, the tabs that are restored on demand are not restored yet."
  },
  "FX_SESSION_RESTORE_MANUAL_RESTORE_DURATION_UNTIL_EAGER_TABS_RESTORED_MS": {
    "alert_emails": ["session-restore-telemetry-alerts@mozilla.com"],
    "expires_in_version": "default",
    "kind": "exponential",
    "low": 100,
    "high": 100000,
    "n_buckets": 20,
    "description": "Session restore: If a session is restored by the user clicking on 'Restore Session', this probe measures the time elapsed between the instant the user has clicked and the instant we have finished restoring tabs eagerly. At this stage, the tabs that are restored on demand are not restored yet."
  },
  "FX_SESSION_RESTORE_NUMBER_OF_TABS_RESTORED": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 500,
    "n_buckets": 20,
    "description": "Session restore: Number of tabs in the session that has just been restored."
  },
  "FX_SESSION_RESTORE_NUMBER_OF_WINDOWS_RESTORED": {
    "expires_in_version": "default",
    "kind": "enumerated",
    "n_values": 50,
    "description": "Session restore: Number of windows in the session that has just been restored."
  },
  "FX_SESSION_RESTORE_NUMBER_OF_EAGER_TABS_RESTORED": {
    "expires_in_version": "default",
    "kind": "enumerated",
    "n_values": 50,
    "description": "Session restore: Number of tabs restored eagerly in the session that has just been restored."
  },
  "FX_TABLETMODE_PAGE_LOAD": {
    "expires_in_version": "47",
    "kind": "exponential",
    "high": 100000,
    "n_buckets": 30,
    "keyed": true,
    "description": "Number of toplevel location changes in tablet and desktop mode (only used on win10 where tablet mode is available)"
  },
  "FX_TOUCH_USED": {
    "expires_in_version": "46",
    "kind": "count",
    "description": "Windows only. Counts occurrences of touch events"
  },
  "FX_URLBAR_SELECTED_RESULT_INDEX": {
    "alert_emails": ["firefox-dev@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 17,
    "releaseChannelCollection": "opt-out",
    "bug_numbers": [775825],
    "description": "Firefox: The index of the selected result in the URL bar popup"
  },
  "FX_URLBAR_SELECTED_RESULT_TYPE": {
    "alert_emails": ["firefox-dev@mozilla.org"],
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 14,
    "releaseChannelCollection": "opt-out",
    "bug_numbers": [775825],
    "description": "Firefox: The type of the selected result in the URL bar popup. See BrowserUsageTelemetry.jsm:URLBAR_SELECTED_RESULT_TYPES for the result types."
  },
  "INNERWINDOWS_WITH_MUTATION_LISTENERS": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Deleted or to-be-reused innerwindow which has had mutation event listeners."
  },
  "CHARSET_OVERRIDE_SITUATION": {
    "expires_in_version": "never",
    "kind": "enumerated",
    "n_values": 8,
    "description": "Labeling status of top-level page when overriding charset (0: unlabeled file URL without detection, 1: unlabeled non-TLD-guessed non-file URL without detection, 2: unlabeled file URL with detection, 3: unlabeled non-file URL with detection, 4: labeled, 5: already overridden, 6: bug, 7: unlabeled with TLD guessing)"
  },
  "CHARSET_OVERRIDE_USED": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the character encoding menu was used to override an encoding in this session."
  },
  "DECODER_INSTANTIATED_ISO2022JP": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for ISO-2022-JP has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_IBM866": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for IBM866 has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACGREEK": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACGREEK has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACICELANDIC": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACICELANDIC has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACCE": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACCE has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACHEBREW": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACHEBREW has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACARABIC": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACARABIC has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACFARSI": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACFARSI has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACCROATIAN": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACCROATIAN has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACCYRILLIC": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACCYRILLIC has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACROMANIAN": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACROMANIAN has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACTURKISH": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACTURKISH has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACDEVANAGARI": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACDEVANAGARI has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACGUJARATI": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACGUJARATI has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_MACGURMUKHI": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for MACGURMUKHI has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_KOI8R": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for KOI8R has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_KOI8U": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for KOI8U has been instantiated in this session."
  },
  "DECODER_INSTANTIATED_ISO_8859_5": {
    "expires_in_version": "never",
    "kind": "flag",
    "description": "Whether the decoder for ISO-8859-5 has been instantiated in this session."
  },
  "LONG_REFLOW_INTERRUPTIBLE": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Long running reflow, interruptible or not"
  },
  "XMLHTTPREQUEST_ASYNC_OR_SYNC": {
    "expires_in_version": "never",
    "kind": "boolean",
    "description": "Type of XMLHttpRequest, async or sync"
  },
  "LOCALDOMSTORAGE_SHUTDOWN_DATABASE_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to flush and close the localStorage database (ms)"
  },
  "LOCALDOMSTORAGE_PRELOAD_PENDING_ON_FIRST_ACCESS": {
    "expires_in_version": "default",
    "kind": "boolean",
    "description": "True when we had to wait for a pending preload on first access to localStorage data, false otherwise"
  },
  "LOCALDOMSTORAGE_GETALLKEYS_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to block before we return a list of all keys in domain's LocalStorage (ms)"
  },
  "LOCALDOMSTORAGE_GETKEY_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to block before we return a key name in domain's LocalStorage (ms)"
  },
  "LOCALDOMSTORAGE_GETLENGTH_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to block before we return number of keys in domain's LocalStorage (ms)"
  },
  "LOCALDOMSTORAGE_GETVALUE_BLOCKING_MS": {
    "expires_in_version": "default",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to block before we return a value for a key in LocalStorage (ms)"
  },
  "LOCALDOMSTORAGE_SETVALUE_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to block before we set a single key's value in LocalStorage (ms)"
  },
  "LOCALDOMSTORAGE_REMOVEKEY_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to block before we remove a single key from LocalStorage (ms)"
  },
  "LOCALDOMSTORAGE_CLEAR_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to block before we clear LocalStorage for all domains (ms)"
  },
  "LOCALDOMSTORAGE_UNLOAD_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to fetch LocalStorage data before we can clean the cache (ms)"
  },
  "LOCALDOMSTORAGE_SESSIONONLY_PRELOAD_BLOCKING_MS": {
    "expires_in_version": "40",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Time to fetch LocalStorage data before we can expose them as session only data (ms)"
  },
  "RANGE_CHECKSUM_ERRORS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "never",
    "kind": "exponential",
    "high": 3000,
    "n_buckets": 10,
    "description": "Number of histograms with range checksum errors"
  },
  "BUCKET_ORDER_ERRORS": {
    "alert_emails": ["perf-telemetry-alerts@mozilla.com"],
    "expires_in_version": "ne