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Css shadows/Fullscreen video problems

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Hello, At some point I've started to have problems with FF displaying css shadows and fullscreen videos.

1) Here's an example of how css shadows look like on a variety of sites when openned in FF: . Chromium displays the same sites perfectly.

2) There's some kind of a problem with the switching to the fullscreen mode. For example at when I click the fullscreen mode button - the video itself starts underneath the browser window and can be switched to with ALT+TAB. Again - Chromium works fine there.

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Try to disable hardware acceleration.

  • Edit > Preferences > Advanced > General > Browsing: "Use hardware acceleration when available"
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Nope, that didn't help. Neither with css, nor with video.