diff -r 000000000000 -r 6474c204b198 browser/branding/nightly/pref/firefox-branding.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/branding/nightly/pref/firefox-branding.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+/* 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/. */
+
+pref("startup.homepage_override_url", "https://www.mozilla.org/projects/firefox/%VERSION%/whatsnew/?oldversion=%OLD_VERSION%");
+pref("startup.homepage_welcome_url", "https://www.mozilla.org/projects/firefox/%VERSION%/firstrun/");
+// The time interval between checks for a new version (in seconds)
+pref("app.update.interval", 7200); // 2 hours
+// The time interval between the downloading of mar file chunks in the
+// background (in seconds)
+pref("app.update.download.backgroundInterval", 60);
+// Give the user x seconds to react before showing the big UI. default=12 hours
+pref("app.update.promptWaitTime", 43200);
+// URL user can browse to manually if for some reason all update installation
+// attempts fail.
+pref("app.update.url.manual", "https://nightly.mozilla.org");
+// A default value for the "More information about this update" link
+// supplied in the "An update is available" page of the update wizard. 
+pref("app.update.url.details", "https://nightly.mozilla.org");
+
+// The number of days a binary is permitted to be old
+// without checking for an update.  This assumes that
+// app.update.checkInstallTime is true.
+pref("app.update.checkInstallTime.days", 2);
+
+// Search codes belong only in builds with official branding
+pref("browser.search.param.yahoo-fr", "");
+pref("browser.search.param.yahoo-fr-cjkt", ""); // now unused
+pref("browser.search.param.yahoo-fr-ja", "");
+pref("browser.search.param.yahoo-f-CN", "");
+#ifdef MOZ_METRO
+pref("browser.search.param.yahoo-fr-metro", "");
+#endif