The issues has been discussed here for Firefox. I have the same issue with other GTK4 applications, f.e.
$ pactree -r gtk4 gtk4 ├─bottles ├─gtksourceview5 │ └─bottles ├─libadwaita │ ├─pamac-gtk │ │ ├─manjaro-application-utility │ │ │ └─manjaro-hello │ │ └─pamac-tray-icon-plasma ├─pamac-gtk
Manjaro is recommending to switch back to GTK3. Are there any plans to adjust GTK4 in near future or what would you recommend? It’s irritating. to have all windows in light colors and only the once shown above in black …