mozilla-b2g/gaia — pull request #14182 by gtorodelvalle (2013-11-28 15:46:00+00:00)
Title: Bug 936250 - [B2G][Contacts] Canceling FB sync results in the contacts app being unresponsive.

The iFrame contents were disposed before the fading out animation was finished and the overlay was still covering the screen although with opacity 0.