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Full screen video doesn't take up the entire screen on MacOS 12.5 unless Firefox is in full screen mode

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  • Last reply by Hami

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When expanding any video to full screen mode, the video does not occupy the entire screen. However, if Firefox itself is in full screen mode, then the video will occupy the full screen.

I tested this on YouTube and another website's video player and was able to consistently replicate the issue.

See image to view the bug in action.

When expanding any video to full screen mode, the video does not occupy the entire screen. However, if Firefox itself is in full screen mode, then the video will occupy the full screen. I tested this on YouTube and another website's video player and was able to consistently replicate the issue. See image to view the bug in action.
Attached screenshots

Modified by Hami

Chosen solution

Found a fix from someone on Reddit.

Go to about:config and change "full-screen-api.macos-native-full-screen" to True.

Works perfectly.

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All Replies (2)

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Looks that Firefox adds a rounded border to make the player look nicer when you maximize the window and do not actually use full screen mode on Mac.

Helpful?

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Chosen Solution

Found a fix from someone on Reddit.

Go to about:config and change "full-screen-api.macos-native-full-screen" to True.

Works perfectly.

Helpful?

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