diff -r 000000000000 -r 6474c204b198 addon-sdk/source/lib/sdk/simple-prefs.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/lib/sdk/simple-prefs.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+/* 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';
+
+module.metadata = {
+  "stability": "experimental"
+};
+
+const { emit, off } = require("./event/core");
+const { PrefsTarget } = require("./preferences/event-target");
+const { preferencesBranch, id } = require("./self");
+const { on } = require("./system/events");
+
+const ADDON_BRANCH = "extensions." + preferencesBranch + ".";
+const BUTTON_PRESSED = id + "-cmdPressed";
+
+const target = PrefsTarget({ branchName: ADDON_BRANCH });
+
+// Listen to clicks on buttons
+function buttonClick({ data }) {
+  emit(target, data);
+}
+on(BUTTON_PRESSED, buttonClick);
+
+module.exports = target;