[Bug]: wrong color/accent maximize-restore down

[denzveloper]

Pre-Submission Checklist

• [X] I have checked the existing/closed issues to ensure this issue has not already been reported.
• [X] I am using the latest supported version of the browser.
• [X] I have tried disabling all browser extensions/add-ons to rule out interference from these.
• [X] I have tried clearing the browser cache and cookies.
• [ ] I have checked with a new profile and the issue still occurs.
• [ ] I have provided detailed step-by-step instructions on how to reproduce the issue.
• [ ] I have included relevant screenshots or console outputs.
• [X] I have checked that this problem is not occurring in the latest version of Firefox ESR.
• [X] This issue is specific to this browser and does not occur in other browsers.

Bug Summary

restore-down window button on KDE Plasma 6 has wrong color (black color) when use dark theme (Breeze-dark). maybe is doesnt following theme what user use.

Reproduction Steps

1. open floorp
2. maximize floorp
3. button has changed to color with white accent (black color)

Expected Behavior

using white color icon, following the themes like firefox:

Actual Behavior

wrong color icon, they use black color, dont like other button

Screenshots

firefox opensuse:

floorp flatpak:

Browser Version

11.18.1 (64-bit) - Flatpak

Operating System

openSUSE Tumbleweed 20240908 x86_64

Additional Context

No response

[surapunoyousei]

Did you try tarball package version ?

[denzveloper]

ok, wait a second..

[denzveloper]

ok tarball version has no problem: