--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -112,23 +112,18 @@ pref("browser.download.forbid_open_with"
 
 // Remove navigator.registerContentHandler
 #ifdef EARLY_BETA_OR_EARLIER
 pref("dom.registerContentHandler.enabled", false);
 #else
 pref("dom.registerContentHandler.enabled", true);
 #endif
 
-// Nightly will have insecure registerProtocolHandler disabled by default
-// Beta and Stable will remain enabled until Firefox 62 providing deprecation stats.
-#ifdef NIGHTLY_BUILD
+// Insecure registerProtocolHandler is disabled by default
 pref("dom.registerProtocolHandler.insecure.enabled", false);
-#else
-pref("dom.registerProtocolHandler.insecure.enabled", true);
-#endif
 
 // Whether or not testing features are enabled.
 pref("dom.quotaManager.testing", false);
 
 // Whether or not indexedDB is enabled.
 pref("dom.indexedDB.enabled", true);
 // Whether or not indexedDB experimental features are enabled.
 pref("dom.indexedDB.experimental", false);