diff --git a/global.js b/global.js
index e7f721d..4b1c483 100644
--- a/global.js
+++ b/global.js
@@ -19,3 +19,6 @@ user_pref("keyword.enabled", true);
 
 // disable letterboxing
 user_pref("privacy.resistFingerprinting.letterboxing", false);
+
+// disable puzzle piece extentions button
+user_pref("extensions.unifiedExtensions.enabled", false);