783937 - YouTube speed test freezes Firefox when invoked from full screen video

Status: RESOLVED DUPLICATE of bug 766548

(Firefox :: Untriaged, defect)

Description

[Lucius Chiaraviglio]

User Agent: Mozilla/5.0 (Windows NT 6.0; rv:14.0) Gecko/20100101 Firefox/14.0.1
Build ID: 20120713134347

Steps to reproduce:

1a.  Start viewing a YouTube video (example found so far:  http://www.youtube.com/watch?v=_v8-lHGnk8M&feature=plcp).
1b.  As above, but make it full screen.
2.  Right-click on video and select "Take speed test".



Actual results:

If the video is not viewed full screen, the video is paused and the YouTube speed test pops up in a new tab, as it should.
BUT, if the video is made full screen, attempting to take the speed test freezes Firefox (3 of 3 times tried so far in Firefox 13 and 1 time tried in Firefox 14.0.1 -- in the latter case the YouTube speed test initially just did not pop up, but when it tried to, Firefox 14.0.1 froze the same as Firefox 13).



Expected results:

Either the YouTube speed test should pop up without freezing Firefox, as in the test path starting with 1a above, but regardless of whether the video is full screen; or if a bug in Adobe Flash makes this impossible, Firefox should complain that something went wrong with Adobe Flash and recover gracefully from the problem.

Google Chrome 21.0.1180.79 m handles this almost properly -- it can give a blank screen after closing the YouTube speed test tab (which pops up without a problem), but it doesn't freeze, and it can get back to the video after Alt-Tabbing away and back, so not 100% of the problem is with Adobe Flash.

This might be related to bug 776219, but I don't have 2 monitors so I can't test that one, and that bug has no mention of this particular problem.