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I can play games that use Flash in Firefox 11, but I can't watch any YouTube videos at all. Why?

  • 2 odpowiedzi
  • 21 osób ma ten problem
  • 9 wyświetleń
  • Ostatnia odpowiedź od cor-el

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For some reason, YouTube videos won't play on Firefox. I have the latest Firefox browser (11.0) and the latest Flash player ( I'm also on Windows 7 if that matters at all. What's weird is it just stopped working literally minutes after my sister watched the last YouTube video that worked.

Now when I go to YouTube on any computer with Firefox, when I go to a video there's just a black box and when I right click it it says "Movie not loaded..." and none of the video thumbnails are visible either.

So far I tried disabling Firefox's crash protection for Flash, and disabled hardware acceleration but neither one fixed my problem. Please help if you can.

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Also, the test animation for Flash still works at

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Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).