[SOLVED] Firefox 89 display problem

Anyone have any idea why with Firefox 89, some elements like check boxes, combo boxes.. are barely visible?
Like in the attached image.
With 88 everything was ok.
It seems to be fixed with deleting and recreating .mozilla profile directory, but I don't want to do this, because of bookmarks, logins, 100+ open tabs...

Removing ~/.mozilla is not than hard than upgrading your kernel..

Actually removing .mozilla doesn't help. It worked for test user, but for my main doesn't work.

You using a "theme" at all? The "System" theme should be using your GTK styling. Perhaps the problem is with your GTK+ settings, rather than Firefox itself (which would explain why main user has the problem).

You don't say what desktop environment you are using, for example KDE has overrides that write ~/.gtkrc-2.0 and ~/.config/gtk-3.0/settings.ini files to match styling.

Firefox 89 seems to ignore some styling settings too, what pissed me off the most was the scrollbars.

Take a look at about:config and type "widget.non-native-theme" in the Search field and you'll see overrides. I like toggling "widget.non-native-theme.enabled" to False.

I'm using KDE Plasma.
It was ~/.config/gtk-3.0/settings.ini, thanks.
Or more correctly, for some reason GNOME/GTK Application style was set to 'Material-Black-Blueberry', after setting it to 'Breeze', checkboxes are displayed correctly.