--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -13023,35 +13023,35 @@
     "kind": "count",
     "keyed": true,
     "description": "Track the number of remove() operations addons perform this subsession. The key is the addon ID.",
     "releaseChannelCollection": "opt-out"
   },
   "FENNEC_SESSIONSTORE_DAMAGED_SESSION_FILE": {
     "record_in_processes": ["main", "content"],
     "alert_emails": ["jh+bugzilla@buttercookie.de"],
-    "expires_in_version": "61",
+    "expires_in_version": "66",
     "kind": "flag",
     "bug_numbers": [1284017],
     "description": "When restoring tabs on startup, reading from sessionstore.js failed, even though the file exists and is not containing an explicitly empty window.",
     "cpp_guard": "ANDROID"
   },
   "FENNEC_SESSIONSTORE_RESTORING_FROM_BACKUP": {
     "record_in_processes": ["main", "content"],
     "alert_emails": ["jh+bugzilla@buttercookie.de"],
-    "expires_in_version": "61",
+    "expires_in_version": "66",
     "kind": "flag",
     "bug_numbers": [1190627],
     "description": "When restoring tabs on startup, reading from sessionstore.js failed, but sessionstore.bak was read successfully.",
     "cpp_guard": "ANDROID"
   },
   "FENNEC_SESSIONSTORE_ALL_FILES_DAMAGED": {
     "record_in_processes": ["main", "content"],
     "alert_emails": ["jh+bugzilla@buttercookie.de"],
-    "expires_in_version": "61",
+    "expires_in_version": "66",
     "kind": "flag",
     "bug_numbers": [1337115],
     "description": "Both the main session file and its backup could not be read and and the first run pref is false.",
     "cpp_guard": "ANDROID"
   },
   "NUMBER_OF_PROFILES": {
     "record_in_processes": ["main", "content"],
     "alert_emails": ["amarchesini@mozilla.com"],