[tbb-bugs] #12977 [Tor Browser]: Fix Firefox's Full Screen Permissions Prompt

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#12977: Fix Firefox's Full Screen Permissions Prompt
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 Reporter:  mikeperry           |          Owner:  tbb-team
     Type:  defect              |         Status:  new
 Priority:  major               |      Milestone:
Component:  Tor Browser         |        Version:
 Keywords:  tbb-fingerprinting  |  Actual Points:
Parent ID:                      |         Points:
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 It looks like it may be slightly tricky but not impossible to fix the full
 screen permissions prompt. The full screen code lives in
 nsDocument::RequestFullScreen(). It actually registers an observer
 ("fullscreen-approved") topic for reacting to the prompt, but then goes
 ahead and reparents the element and full screens anyway.

 We might be able to refactor this code such that it gets called from the
 observer callback, after the user has interacted with the dialog.

 Probably best done after FF31-ESR though.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12977>
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