Hi,

Problem: After upgrading to Firefox v128 from v115, Firefox seems to have 
stopped using some mouse cursors as per the active KDE mouse cursor theme (the 
Oxygen White theme, in my case). For some reason, instead of showing the white 
arrow mouse cursor as per the theme, FF now shows a black mouse cursor.

Used to work fine in FF v115 (and many prior FF versions) before the upgrade.

More info:

1. The issue appears to affect all mouse cursor themes (Adwaita, all Oxygen, 
etc) with the exception of Breeze cursor themes (maybe because I'm using Breeze 
global desktop theme?).

2. Only the first (and perhaps the most important) arrow mouse cursor is 
affected, the rest seem to work properly. For example, with the Oxygen White 
cursor theme active, FF v128 shows black arrow mouse cursor instead of the 
white arrow cursor, but also correctly shows the white hand from the the Oxygen 
White theme when the cursor hovers over the links.

3. With the Breeze Light theme active, FF v128 correctly shows all mouse 
cursors, including showing the white arrow cursor when appropriate.

Any ideas? Thanks


KDE global theme: Breeze
KDE mouse cursor theme: Oxygen White (other Oxygen mouse cursor themes also 
have the above issue)

$ aptitude show firefox-esr
Package: firefox-esr
Version: 128.3.0esr-1~deb12u1

Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.5  KDE Frameworks Version: 5.103.0  Qt Version: 5.15.8
Kernel Version: 6.1.0-26-amd64 (64-bit)
Graphics Platform: X11

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