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Adobe Shockwave Flash player on Firefox shows an error screen on youtube player like this

error screen

And not able to play anything no matter what. Had the same problem with chromium and fixed it with the solution explained here. Any help?? Thanks in advance.

Then came the update from ubuntu. Now flash works with some minor bugs

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Youtube has problems right now, wait for a while and try again. – Braiam Jul 7 '14 at 20:35

If it's a problem with Flash player, try to use HTML5 player instead. Turn off Flash plugin at the about:addons page, and try again.

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i removed the flash plug-in and installed the html5 add-on, but it still asks for the adobe flash player on youtube – theDistantStar Jul 7 '14 at 11:50
Go to and if there is a button "Request the HTML5 player", click it. – user300458 Jul 7 '14 at 11:57
still shows the error screen and asks for flash activation. And by clicking that button, the browser supports are HTMLVideoElement and WebM VP8. rest of the Media Source Extensions, MSE & H.264, MSE & WebM VP9 are not supported – theDistantStar Jul 7 '14 at 16:02

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