Question

Embedded video is black but with audio, but the video works fine on youtube.

I'm having trouble with firefox not been able to display embedded video on sites. I see the preview image but when i start play all video area becomes black and I can hear the audio playing. I also can pause the "video".

If I start firefox in safe mode, it works. I have deactivated all my extensions/add-ons, without any success. I have reset all cache, no success I have restored to factory result, no success I have uninstalled firefox, and deleting all local data and reinstalled firefox, still same problems.

I have tested to go to http://www.youtube.com/html5 and activated the html5 player, and then I see the play button, progressbar and volume etc, but still no video.

The video is working fine in IE 9 and Chrome (unknown version, but since it autoupdates it's probably the latest)

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