https://bugs.kde.org/show_bug.cgi?id=491427
Bug ID: 491427
Summary: Fractional scaling + Firefox in fullscreen: Maximized
YT video shown shrinked when maximized
Classification: Plasma
Product: kwin
Version: 6.1.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: pos...@posteo.eu
Target Milestone: ---
Created attachment 172393
--> https://bugs.kde.org/attachment.cgi?id=172393&action=edit
Screenshot
Not sure whether this is an upstream bug or a kwin bug. :)
STEPS TO REPRODUCE
1. Start Firefox with a new profile (`firefox -p`) on Plasma Wayland
2. Change Plasma's screen scaling to 1.25
3. Open any YT video such as the one for Plasma Akademy
> https://www.youtube.com/watch?v=l61CmpLiCzs
4. Press F11 to make Firefox go into fullscreen mode
5. Press the "Maximize video" button in the lower right corner of the YT video
OBSERVED RESULT
The video is shown shrinked in the upper left corner. The background is white.
When changing the scaling back to 1.0 everything looks fine again.
EXPECTED RESULT
The video is shown full screen independently of the scaling factor.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.3
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.2
Kernel Version: 6.9.12-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Firefox 128.0.3 (Wayland) - new profile
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