--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -9569,33 +9569,33 @@
     "kind": "enumerated",
     "n_values": 64,
     "description": "Count of scroll actions triggered by different input methods. See gfx/layers/apz/util/ScrollInputMethods.h for a list of possible values and their meanings."
   },
   "WEB_NOTIFICATION_CLICKED": {
     "releaseChannelCollection": "opt-out",
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1225336],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "count",
     "description": "Count of times a web notification was clicked"
   },
   "WEB_NOTIFICATION_MENU": {
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1225336],
     "expires_in_version": "50",
     "kind": "enumerated",
     "n_values": 5,
     "description": "Count of times a contextual menu item was used from a Notification (0: DND, 1: Disable, 2: Settings)"
   },
   "WEB_NOTIFICATION_SHOWN": {
     "releaseChannelCollection": "opt-out",
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1225336],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "count",
     "description": "Count of times a Notification was rendered (accounting for XUL DND). A system backend may put the notification directly into the tray if its own DND is on."
   },
   "WEBFONT_DOWNLOAD_TIME": {
     "alert_emails": ["jdaggett@mozilla.com"],
     "expires_in_version": "never",
     "kind": "exponential",
     "high": 60000,
@@ -9687,17 +9687,17 @@
     "expires_in_version": "50",
     "kind": "count",
     "description": "Number of times the Notification Permissions dialog has been opened."
   },
   "WEB_NOTIFICATION_PERMISSIONS": {
     "releaseChannelCollection": "opt-out",
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1219030],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "n_values": 10,
     "description": "Number of origins with the web notifications permission (0 = denied, 1 = allowed)."
   },
   "WEB_NOTIFICATION_PERMISSION_REMOVED": {
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1219030],
     "expires_in_version": "50",