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Cannot watch videos on youtube,

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Tried updating flash player, clearing cache and disabling hardware acceleration and still does not work. This was also happening before I updated to the new BETA version of Firefox. When I try using IE9 or Chrome everything works fine. Firefox was my primary browser, then one day for some reason it just stopped playing embedded videos and flash

Tried updating flash player, clearing cache and disabling hardware acceleration and still does not work. This was also happening before I updated to the new BETA version of Firefox. When I try using IE9 or Chrome everything works fine. Firefox was my primary browser, then one day for some reason it just stopped playing embedded videos and flash

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There are some compatibility issues between the latest Flash player and some Firefox add-ons or settings. Could you see whether anything in this article helps: Flash 11.3 doesn't load video in Firefox.