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problems with videos not playing in Firefox

  • 7 uphendule
  • 1 inale nkinga
  • Igcine ukuphendulwa ngu jscher2000

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About 1 week ago I started having problems with videos not playing in Firefox.....videos are working on other browser [IE]

All Replies (7)

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Is this with many websites, some, a few?

I see you do not have the flash player listed in your system details. Some sites are still using flash player.

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This seems to be the most problematic with You Tube vids on HSN site etc.....but even vids from local news feeds will freeze up Firefox.....this just started a little over a week ago.....have made know known changes to my PC [Lenovo all in one desk], or to anything on my computer.....if I switch over to different browser [IE] all is fine.

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Hi kydzwest, could you check YouTube's HTML5 support page here:

What do you see?

In Firefox 63, it's common to have blue checkmarks for all 6 boxes. In earlier versions of Firefox the last box often had a red mark.

That last box could be the problem...

Firefox 63 enabled support for VP9, which is a codec created by Google. Several users have requested a way to hide this capability from YouTube so they can continue to use older codecs because VP9 is hard on their CPU.

Two possible workarounds:

(A) The h264ify add-on:

That hides both VP9 and VP8 support, so sites serve H.264/MP4 video instead.

(B) VP9 hider user script:

I created a userscript based on the h264ify extension that is more targeted -- it blocks VP9 without blocking VP8. It tested out working in Tampermonkey and Violentmonkey, but not in Greasemonkey.

Step 1 is to get a "monkey" extension that lets you inject snippets of script into web pages:

Step 2 is to install the script from here:

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All 6 boxes are blue checked.....I'm not very tech savvy so I don't understand some of the other parts of your info .....sorry.....could you explain in simpler fashion?....Thank You

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I think the simplest thing I can suggest is to try the h264ify extension and see whether it makes any difference.

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Could you tell me [step by step] how to do this?

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Oh, it's an add-on. You go to this page on the Add-ons site and look for the "Add to Firefox" button: