mozilla/fireplace — pull request #376 by mstriemer (2014-02-21 21:48:26+00:00)
Title: hide the install spinner we focus is regained (bug 974196)

https://bugzilla.mozilla.org/show_bug.cgi?id=974196

When the window regains focus, hide the spinner. I'm assuming that once the user comes back to marketplace they have either installed or cancelled. There is no event for the installation being cancelled, just when there is an error.