This is functionally complete with some test coverage: https://hg.mozilla.org/projects/elm/rev/e8ffe4076eed The UI is placeholder however, with ugly buttons. I've opened a new ticket for addressing that: https://bugzilla.mozilla.org/show_bug.cgi?id=828262
Resolving bugs in the Firefox for Metro product that are fixed on the elm branch. Sorry for the bugspam. Search your email for "bugspam-elm" if you want to find and delete all of these messages at once.