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Certain webms won't play in Firefox

asked 2015-09-13 06:37:22 -0500

scherdee gravatar image

When I go to youtube, some videos play and some stuck begining, however downloading is active according to stats. Same happens with other webm videos.

So I just wiped firefox out of my computer, reinstalled it, enabled mediasource and mediasource.webm, but the problem still remains. Disabling hardware acceleration in browser doesn't help.

In chromium it works well but I'd like to use firefox. What may be causing the problem?

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answered 2015-09-13 10:20:57 -0500

masteroman gravatar image

Are all of the options on Youtube HTML5 webpage available to you?

If not you can go to your about:config page and enable following options (set them to true):


When you changed those options go to the Youtube HTML5 webpage and check if all of the options are now available.

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answered 2018-10-29 10:15:22 -0500

jpbn gravatar image

Maybe the new release of can help you?

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Asked: 2015-09-13 06:37:22 -0500

Seen: 415 times

Last updated: Sep 13 '15