diff --git a/browser/metro/base/content/Util.js b/browser/metro/base/content/Util.js
index 316e5c317fd8..dc7176747eb2 100644
--- a/browser/metro/base/content/Util.js
+++ b/browser/metro/base/content/Util.js
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+Components.utils.import("resource:///modules/ContentUtil.jsm");
+
 let Util = {
   /*
    * General purpose utilities
@@ -37,44 +39,6 @@ let Util = {
     Services.io.offline = false;
   },
 
-  // Pass several objects in and it will combine them all into the first object and return it.
-  // NOTE: Deep copy is not supported
-  extend: function extend() {
-    // copy reference to target object
-    let target = arguments[0] || {};
-    let length = arguments.length;
-
-    if (length === 1) {
-      return target;
-    }
-
-    // Handle case when target is a string or something
-    if (typeof target != "object" && typeof target != "function") {
-      target = {};
-    }
-
-    for (let i = 1; i < length; i++) {
-      // Only deal with non-null/undefined values
-      let options = arguments[i];
-      if (options != null) {
-        // Extend the base object
-        for (let name in options) {
-          let copy = options[name];
-
-          // Prevent never-ending loop
-          if (target === copy)
-            continue;
-
-          if (copy !== undefined)
-            target[name] = copy;
-        }
-      }
-    }
-
-    // Return the modified object
-    return target;
-  },
-
   /*
    * Timing utilties
    */
@@ -540,3 +504,11 @@ Util.Timeout.prototype = {
   }
 };
 
+// Mixin the ContentUtil module exports
+{
+  for (let name in ContentUtil) {
+    let copy = ContentUtil[name];
+    if (copy !== undefined)
+      Util[name] = copy;
+  }
+}
diff --git a/browser/metro/base/tests/unit/test_util_extend.js b/browser/metro/base/tests/unit/test_util_extend.js
index 2d32c9760804..a22ca7adbc5f 100644
--- a/browser/metro/base/tests/unit/test_util_extend.js
+++ b/browser/metro/base/tests/unit/test_util_extend.js
@@ -1,10 +1,10 @@
 "use strict";
 
-load('Util.js');
+load("Util.js");
 
 function run_test() {
   do_print("Testing Util.extend");
-  
+
   do_print("Check if function is defined");
   do_check_true(!!Util.extend);
 
@@ -14,7 +14,7 @@ function run_test() {
 
   let nullRes = Util.extend(null);
   do_check_true(nullRes && typeof nullRes == "object");
-  
+
   do_print("Simple extend");
   let simpleExtend = {a: 1, b: 2};
   let simpleExtendResult = Util.extend(simpleExtend, {b: 3, c: 4});
diff --git a/browser/metro/base/tests/unit/xpcshell.ini b/browser/metro/base/tests/unit/xpcshell.ini
index 8d01cd7508fd..8cc41da1188c 100644
--- a/browser/metro/base/tests/unit/xpcshell.ini
+++ b/browser/metro/base/tests/unit/xpcshell.ini
@@ -1,5 +1,6 @@
 [DEFAULT]
-head = 
+head =
 tail =
+firefox-appdir = metro
 
 [test_util_extend.js]
diff --git a/browser/metro/modules/ContentUtil.jsm b/browser/metro/modules/ContentUtil.jsm
new file mode 100644
index 000000000000..2b80a571f91b
--- /dev/null
+++ b/browser/metro/modules/ContentUtil.jsm
@@ -0,0 +1,47 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["ContentUtil"];
+
+this.ContentUtil = {
+  // Pass several objects in and it will combine them all into the first object and return it.
+  // NOTE: Deep copy is not supported
+  extend: function extend() {
+    // copy reference to target object
+    let target = arguments[0] || {};
+    let length = arguments.length;
+
+    if (length === 1) {
+      return target;
+    }
+
+    // Handle case when target is a string or something
+    if (typeof target != "object" && typeof target != "function") {
+      target = {};
+    }
+
+    for (let i = 1; i < length; i++) {
+      // Only deal with non-null/undefined values
+      let options = arguments[i];
+      if (options != null) {
+        // Extend the base object
+        for (let name in options) {
+          let copy = options[name];
+
+          // Prevent never-ending loop
+          if (target === copy)
+            continue;
+
+          if (copy !== undefined)
+            target[name] = copy;
+        }
+      }
+    }
+
+    // Return the modified object
+    return target;
+  }
+
+};
diff --git a/browser/metro/modules/moz.build b/browser/metro/modules/moz.build
index 835b2bd21f71..69f8f89b0809 100644
--- a/browser/metro/modules/moz.build
+++ b/browser/metro/modules/moz.build
@@ -5,6 +5,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 EXTRA_JS_MODULES += [
+    'ContentUtil.jsm',
     'CrossSlide.jsm',
     'View.jsm',
     'colorUtils.jsm',