Backed out changeset 917f3b2fd556 (bug 1709838) for causing multiple failures CLOSED TREE

modules/libpref/init/StaticPrefList.yaml

@@ -3045,7 +3045,7 @@
 # is set to true then this pref has no effect)
 - name: dom.security.https_first_pbm
   type: RelaxedAtomicBool
-  value: @IS_NIGHTLY_BUILD@
+  value: false
   mirror: always
 
 - name: dom.security.unexpected_system_load_telemetry_enabled