Bug 1367145 - Enable the "What's new?" menuitem also for nightly r=florian

MozReview-Commit-ID: 4bSWkoBIXJt

--HG--
extra : rebase_source : de20be4d276e9c3e770ae942a9c58ce5fb3b556d

browser/branding/nightly/pref/firefox-branding.js

@@ -20,6 +20,8 @@ pref("app.update.url.manual", "https://nightly.mozilla.org");
 // supplied in the "An update is available" page of the update wizard.
 pref("app.update.url.details", "https://nightly.mozilla.org");
 
+pref("app.releaseNotesURL", "https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-browser&utm_campaign=whatsnew");
+
 // The number of days a binary is permitted to be old
 // without checking for an update.  This assumes that
 // app.update.checkInstallTime is true.