diff --git a/global.js b/global.js
index 18b7869..b9d91db 100644
--- a/global.js
+++ b/global.js
@@ -32,3 +32,6 @@ user_pref("apz.gtk.touchpad_pinch.enabled", false);
 // disable swipe to go back or forward
 user_pref("browser.gesture.swipe.left", "");
 user_pref("browser.gesture.swipe.right", "");
+
+// disable drm
+user_pref("media.gmp-widevinecdm.enabled", false);