--- a/toolkit/components/extensions/ext-management.js
+++ b/toolkit/components/extensions/ext-management.js
@@ -10,17 +10,17 @@ XPCOMUtils.defineLazyGetter(this, "strBu
   return stringSvc.createBundle("chrome://global/locale/extensions.properties");
 });
 XPCOMUtils.defineLazyModuleGetter(this, "AddonManager",
                                   "resource://gre/modules/AddonManager.jsm");
 XPCOMUtils.defineLazyServiceGetter(this, "promptService",
                                    "@mozilla.org/embedcomp/prompt-service;1",
                                    "nsIPromptService");
 XPCOMUtils.defineLazyModuleGetter(this, "EventEmitter",
-                                  "resource://devtools/shared/event-emitter.js");
+                                  "resource://gre/modules/EventEmitter.jsm");
 
 XPCOMUtils.defineLazyGetter(this, "GlobalManager", () => {
   const {GlobalManager} = Cu.import("resource://gre/modules/Extension.jsm", {});
   return GlobalManager;
 });
 
 var {
   ExtensionError,