--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -5607,37 +5607,37 @@
     "expires_in_version": "never",
     "kind": "boolean",
     "description": "Count the number of times the user clicked 'allow' on the hidden-plugin infobar."
   },
   "POPUP_NOTIFICATION_STATS": {
     "releaseChannelCollection": "opt-out",
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1207089],
-    "expires_in_version": "50",
+    "expires_in_version": "55",
     "kind": "enumerated",
     "keyed": true,
     "n_values": 40,
     "description": "(Bug 1207089) Usage of popup notifications, keyed by ID (0 = Offered, 1..4 = Action, 5 = Click outside, 6 = Leave page, 7 = Use 'X', 8 = Not now, 10 = Open submenu, 11 = Learn more. Add 20 if happened after reopen.)"
   },
   "POPUP_NOTIFICATION_MAIN_ACTION_MS": {
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1207089],
-    "expires_in_version": "52",
+    "expires_in_version": "55",
     "kind": "exponential",
     "keyed": true,
     "low": 100,
     "high": 600000,
     "n_buckets": 40,
     "description": "(Bug 1207089) Time in ms between initially requesting a popup notification and triggering the main action, keyed by ID"
   },
   "POPUP_NOTIFICATION_DISMISSAL_MS": {
     "alert_emails": ["firefox-dev@mozilla.org"],
     "bug_numbers": [1207089],
-    "expires_in_version": "52",
+    "expires_in_version": "55",
     "kind": "exponential",
     "keyed": true,
     "low": 200,
     "high": 20000,
     "n_buckets": 50,
     "description": "(Bug 1207089) Time in ms between displaying a popup notification and dismissing it without an action the first time, keyed by ID"
   },
   "PRINT_PREVIEW_OPENED_COUNT": {