diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/fixtures/loader/unsupported/firefox.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/fixtures/loader/unsupported/firefox.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+/* 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/. */
+
+module.metadata = {
+  "engines": {
+    "Firefox": "*"
+  }
+};
+module.exports = {};