diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/moz.build
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/moz.build	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+DIRS += ['internal']
+TEST_DIRS += ['test']
+
+XPIDL_SOURCES += [
+    'amIAddonManager.idl',
+    'amIWebInstaller.idl',
+    'amIWebInstallListener.idl',
+]
+
+XPIDL_MODULE = 'extensions'
+
+EXTRA_COMPONENTS += [
+    'addonManager.js',
+    'amContentHandler.js',
+    'amInstallTrigger.js',
+    'amWebInstallListener.js',
+]
+
+EXTRA_PP_COMPONENTS += [
+    'extensions.manifest',
+    'nsBlocklistService.js',
+]
+
+EXTRA_JS_MODULES += [
+    'ChromeManifestParser.jsm',
+    'DeferredSave.jsm',
+    'LightweightThemeManager.jsm',
+]
+
+EXTRA_PP_JS_MODULES += [
+    'AddonManager.jsm'
+]
+
+if CONFIG['MOZ_UPDATE_CHANNEL'] not in ('aurora', 'alpha', 'beta', 'release', 'esr'):
+    DEFINES['MOZ_COMPATIBILITY_NIGHTLY'] = 1
+
+# Additional debugging info is exposed in debug builds
+if CONFIG['MOZ_EM_DEBUG']:
+    DEFINES['MOZ_EM_DEBUG'] = 1
+
+JAR_MANIFESTS += ['jar.mn']