FYI: working temporary solution / positiv work-around!
- My
~/.config/fontconfig/fonts.conf
is not relevant. - openSUSE standard build 128 ESR DOES work without modifications in
about:config
- Flatpak 143 DOES work without modifications in
about:config
— but does have different specific standard values! - openSUSE standard build 140 ESR does NOT work with standard values — but CAN work with modifications in
about:config
— the standard values are different again: from 128 ESR AND from Flatpak 143!
Please view and compare! I marked the areas of interest.
I don’t have a clue about the meaning and background, i.e. is this really really a bug (maybe not!) or just different standard behaviour…?