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HTML5 video fullscreen issue on OS 10.10.4

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  • Last reply by AriZ

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When watching YouTube (or other HMTL5 video content) in Firefox the video's fullscreen mode does not work correctly. When I press the fullscreen button (usually to be found at the right-bottom) and Firefox switches to fullscreen mode my tab bar and url bar are still visible, but my bookmark bar is gone. When I return from fullscreen the bookmark bar does not reappear.

In Firefox 39 I was able to switch to Fullscreen (without any visible bar) and return from it (without losing any bar in the process) and didn't have any problems.

Do you have a solution for this problem or should I just wait for this bug to be fixed?

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Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options)
key, and then starting Firefox. Is the problem still there?


check this:

  • see if there are updates for your graphics drive drivers

https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

  • disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)

https://forums.adobe.com/message/4468493#TemporaryWorkaround

  • disable hardware acceleration in the Flash plugin

https://forums.adobe.com/thread/891337 See also:

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The latest update 40b4 solved this issue for me, but thanks for the help FredMcD.