diff --git a/mobile/chrome/content/browser.js b/mobile/chrome/content/browser.js
index 32af34eedca..54bad15cbc5 100644
--- a/mobile/chrome/content/browser.js
+++ b/mobile/chrome/content/browser.js
@@ -35,7 +35,6 @@
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
-"use strict";
 
 let Cc = Components.classes;
 let Ci = Components.interfaces;