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Videos not playing in Firefox

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cile.extra
cile.extra
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Recently got a new computer and most websites will not play videos. Youtube works, Netflix does not (Netflix Error F7701-1003), Reddit video player does not, https://www.pexels.com/videos/ doers not.

I have tried troubleshooting mode, reinstalling firefox, have made sure it is up to date, cleared cache, and I'm not using any addons.

These videos work in Edge so I don't think it's my drivers (checked that they are up to date).

Recently got a new computer and most websites will not play videos. Youtube works, Netflix does not (Netflix Error F7701-1003), Reddit video player does not, https://www.pexels.com/videos/ doers not. I have tried troubleshooting mode, reinstalling firefox, have made sure it is up to date, cleared cache, and I'm not using any addons. These videos work in Edge so I don't think it's my drivers (checked that they are up to date).

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cor-el
cor-el
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See:

Make sure Firefox isn't set to run in permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History).

  • Settings -> Privacy & Security
    Firefox will: "Use custom settings for history"
  • remove checkmark: [ ] "Always use Private Browsing mode"

You can toggle DRM off/on to see if that makes Firefox (re)load DRM components.

You can possibly check the XHR requests in the Browser Console if this doesn't work.