diff --git a/application/palemoon/components/nsBrowserGlue.js b/application/palemoon/components/nsBrowserGlue.js
index 8fc24c7d34..5b7fdde339 100644
--- a/application/palemoon/components/nsBrowserGlue.js
+++ b/application/palemoon/components/nsBrowserGlue.js
@@ -432,11 +432,6 @@ BrowserGlue.prototype = {
     
     LoginManagerParent.init();
     
-    // Make sure conflicting MSE prefs don't coexist
-    if (Services.prefs.getBoolPref('media.mediasource.format-reader', true)) {
-      Services.prefs.setBoolPref('media.mediasource.webm.enabled', false);
-    }
-
     Services.obs.notifyObservers(null, "browser-ui-startup-complete", "");
   },