diff --git a/test b/test
index d6a8bab..5127eaf 100644
--- a/test
+++ b/test
@@ -1800,6 +1800,9 @@ user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features",
 // [SETTING] General>Browsing>Recommend features as you browse
 user_pref("network.manage-offline-status", false); // see bugzilla 620472
 // user_pref("xpinstall.signatures.required", false); // enforced extension signing (Nightly/ESR)
+// -------------------------------------
+// Test user.js in about:config
+user_pref("_config.applied", true);
 //
 // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 // DEPRECATED / REMOVED / LEGACY / RENAMED