--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -1,33 +1,41 @@
 {
   "A11Y_INSTANTIATED_FLAG": {
-    "record_in_processes": ["main", "content"],
+    "record_in_processes": ["main"],
     "expires_in_version": "never",
     "kind": "flag",
-    "description": "has accessibility support been instantiated"
+    "releaseChannelCollection": "opt-out",
+    "bug_numbers": [1382820],
+    "description": "Flag indicating accessibility support has been instantiated.",
+    "alert_emails": ["accessibility@mozilla.com"]
   },
   "A11Y_CONSUMERS": {
-    "record_in_processes": ["main", "content"],
+    "record_in_processes": ["main"],
     "expires_in_version": "default",
     "kind": "enumerated",
     "n_values": 11,
-    "description": "Accessibility client by enum id"
+    "releaseChannelCollection": "opt-out",
+    "bug_numbers": [1382820],
+    "description": "A list of known accessibility clients that inject into Firefox process space (see https://dxr.mozilla.org/mozilla-central/source/accessible/windows/msaa/Compatibility.h).",
+    "alert_emails": ["accessibility@mozilla.com"]
   },
   "A11Y_ISIMPLEDOM_USAGE_FLAG": {
-    "record_in_processes": ["main", "content"],
+    "record_in_processes": ["main"],
     "expires_in_version": "default",
     "kind": "flag",
-    "description": "have the ISimpleDOM* accessibility interfaces been used"
+    "description": "Flag indicating the ISimpleDOM* accessibility interfaces has been used.",
+    "alert_emails": ["accessibility@mozilla.com"]
   },
   "A11Y_IATABLE_USAGE_FLAG": {
-    "record_in_processes": ["main", "content"],
+    "record_in_processes": ["main"],
     "expires_in_version": "default",
     "kind": "flag",
-    "description": "has the IAccessibleTable accessibility interface been used"
+    "description": "Flag indicating the IAccessibleTable accessibility interface has been used.",
+    "alert_emails": ["accessibility@mozilla.com"]
   },
   "ADDON_CONTENT_POLICY_SHIM_BLOCKING_LOADING_MS": {
     "record_in_processes": ["main", "content"],
     "expires_in_version": "58",
     "kind": "exponential",
     "high": 60000,
     "n_buckets": 20,
     "keyed": true,

--- a/toolkit/components/telemetry/histogram-whitelists.json
+++ b/toolkit/components/telemetry/histogram-whitelists.json
@@ -1,14 +1,10 @@
 {
   "alert_emails": [
-    "A11Y_CONSUMERS",
-    "A11Y_IATABLE_USAGE_FLAG",
-    "A11Y_INSTANTIATED_FLAG",
-    "A11Y_ISIMPLEDOM_USAGE_FLAG",
     "ADDON_SHIM_USAGE",
     "AUDIOSTREAM_FIRST_OPEN_MS",
     "AUDIOSTREAM_LATER_OPEN_MS",
     "AUTO_REJECTED_TRANSLATION_OFFERS",
     "BACKGROUNDFILESAVER_THREAD_COUNT",
     "BAD_FALLBACK_FONT",
     "BROWSERPROVIDER_XUL_IMPORT_BOOKMARKS",
     "BROWSER_IS_ASSIST_DEFAULT",
@@ -611,19 +607,17 @@
     "WEBCRYPTO_EXTRACTABLE_SIG",
     "WEBCRYPTO_METHOD",
     "WEBCRYPTO_RESOLVED",
     "WEBSOCKETS_HANDSHAKE_TYPE",
     "XMLHTTPREQUEST_ASYNC_OR_SYNC",
     "XUL_CACHE_DISABLED"
   ],
   "bug_numbers": [
-    "A11Y_CONSUMERS",
     "A11Y_IATABLE_USAGE_FLAG",
-    "A11Y_INSTANTIATED_FLAG",
     "A11Y_ISIMPLEDOM_USAGE_FLAG",
     "ADDON_SHIM_USAGE",
     "APPLICATION_REPUTATION_COUNT",
     "APPLICATION_REPUTATION_LOCAL",
     "APPLICATION_REPUTATION_SERVER",
     "APPLICATION_REPUTATION_SHOULD_BLOCK",
     "AUDIOSTREAM_FIRST_OPEN_MS",
     "AUDIOSTREAM_LATER_OPEN_MS",