mozilla/fireplace — pull request #732 by mstriemer (2014-10-17 19:55:09+00:00)
Title: Only register one FxA message handler (bug 1080347)

https://bugzilla.mozilla.org/show_bug.cgi?id=1080347

Register the FxA message handler when `login.js` is loaded instead of when the "Sign In" button is clicked so we only ever register one handler.