Embedded videos not playing after Firefox update, screen turns dark green
My Firefox browser recently updated to 115.11.0esr (64-bit), and now embedded videos won't play, I can initially see a picture, but instead of starting to play, the screen turns dark green and I can only hear the sound. This happened once before recently, but then it seemed to fix itself after a week or two. How can this be fixed?
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Show the issue and provide steps to replicate.
Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.
- switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
- do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window