Fullscreen content is offset with black border on left and bottom when browser.nova.enabled is enabled
Categories
(Firefox :: Theme, defect)
Tracking
()
People
(Reporter: Pfize183, Unassigned)
Details
Attachments
(1 file)
Screenshot showing the fullscreen rendering offset. The red arrows highlight the black borders on the left and bottom when Nova is enabled.
When browser.nova.enabled is set to true, fullscreen mode is rendered incorrectly on my system.
The browser content is shifted, leaving a black border on the left and bottom edges of the screen. As a result, the webpage does not completely fill the display.
Expected result:
Fullscreen should completely fill the display without any black borders or offset.
Additional information:
Setting browser.nova.enabled back to false immediately fixes the issue. No Firefox restart is required. If I set it back to true the fullscreen content has the offset again, leaving black borders on the left an bottom.
The issue is reproducible every time on my system.
Firefox version: 155.0a1 (2026-07-29 Nightly)
Operating System: Windows 11 Version 25H2 (Build 26200.8894)
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Comment 1•2 months ago
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I couldn't reproduce the problem. Do you have a link to an example where this happens?
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Comment 2•2 months ago
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On YouTube, with every video. I'm having the same problem on my second PC, too.
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Comment 3•2 months ago
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Do you use vertical tabs and are the tabs collapsed? If the answer is yes, then it's probably a duplicate of bug 2057087. And since bug 2057087 is fixed now - could you test again?
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Reporter | |
Comment 4•2 months ago
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Sorry, I forget to say that the problem is gone since a few days. But yes, I use vertical tabs in colapsed mode. This confirms your assumption that the problem with yy has been fixed. (sorry for my translator englisch 🙈)
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Comment 5•2 months ago
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Thanks for the confirmation!
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