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I can no longer play youtube videos in Firefox using Ubuntu 12.04 64 bit.

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Nothing has been changed on my PC that I know of, but suddenly youtube videos won't play, even ones I have viewed before. This has been within the last 48 hours.

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Please check if all your plugins are up-to-date. To do this, go to the Mozilla Plugin Check site.

Once you're there, the site will check if all your plugins have the latest versions. If you see plugins in the list that have a yellow Update button or a red Update now button, please update these immediately.

To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

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The latest Flash player for Firefox on Linux is 11.2.202.251.


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

  • Do not click the Reset button on the Safe mode start window or otherwise make changes.
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Sorry for the late reply. I downloaded the flash-aid add-on, and now everything works. :)

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i guess i have the same problem. ubuntu 10.04 64 bit i up graded through automatic up dates from firefox 18.0.2 to 19 and my you tube videos no longer work now on another system i have not up dated yet and it is running firefox 18.0.2 and you tube works fine

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after installing flash-aid i still had the same problem, so process of alimation and found it is download helper causing the problems. everything look ok when it is disabled

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It seems that it is a problem with AdBlock extension. Maybe youtube blocks AdBlocked browsers????