--- a/mail/base/content/mailWindowOverlay.js
+++ b/mail/base/content/mailWindowOverlay.js
@@ -30,18 +30,18 @@ var {TagUtils} = ChromeUtils.import("res
 var {MessageArchiver} = ChromeUtils.import("resource:///modules/MessageArchiver.jsm");
 
 var {BrowserToolboxProcess} = ChromeUtils.import("resource://devtools/client/framework/ToolboxProcess.jsm");
 var {ScratchpadManager} = ChromeUtils.import("resource://devtools/client/scratchpad/scratchpad-manager.jsm");
 var {ExtensionParent} = ChromeUtils.import("resource://gre/modules/ExtensionParent.jsm");
 var {ExtensionSupport} = ChromeUtils.import("resource:///modules/ExtensionSupport.jsm");
 Object.defineProperty(this, "HUDService", {
   get() {
-    let { devtools } = ChromeUtils.import("resource://devtools/shared/Loader.jsm");
-    return devtools.require("devtools/client/webconsole/hudservice").HUDService;
+    let { loader } = ChromeUtils.import("resource://devtools/shared/Loader.jsm");
+    return loader.require("devtools/client/webconsole/hudservice").HUDService;
   },
   configurable: true,
   enumerable: true,
 });
 
 var ADDR_DB_LARGE_COMMIT = 1;
 
 var kClassicMailLayout = 0;