--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -13808,12 +13808,13 @@
     "description": "Total number of doc groups per tab group, including docgroups fully in bfcache. Collected at the point when the top level document of the tab group is unloaded."
   },
   "HIDDEN_VIEWPORT_OVERFLOW_TYPE": {
     "record_in_processes": ["content"],
     "alert_emails": ["xquan@mozilla.com", "botond@mozilla.com"],
     "bug_numbers": [1423013, 1423017],
     "expires_in_version": "65",
     "kind": "categorical",
+    "releaseChannelCollection": "opt-out",
     "labels": ["NoOverflow", "Desktop", "ButNotMinScaleSize", "MinScaleSize"],
     "description": "How common are different types of out-of-reach viewport overflow?"
   }
 }