[Desktop] Firefox from ppa doesnt have fully set theme coloring but from snap it does - why?

[tomek]

I followed this guide ---> https://askubuntu.com/a/1404401

and now it doesnt comply with global theme why?
PIC attached: https://ibb.co/WWNmmm7X

on snap version it kept gray theming there is black.


Operating System: Kubuntu 25.10
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Kernel Version: 6.17.0-8-generic (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5600H with Radeon Graphics
Memory: 24 GiB of RAM (22.8 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 3050 Laptop GPU
Graphics Processor 2: AMD Radeon Graphics
Manufacturer: MEDION
Product Name: Crawler E25