Created attachment 859931 [details]
bad display with Helvetica Font

Hello,
On Tumbleweed : firefox from flathub uses a bad quality helvetica font, while
firefox from openSUSE repository uses Liberation. See the screenshots.
I have the same issue with flatpak on Leap 15.4
On fedora kinoite, firefox from flathub uses Liberation font, there is not the
same bug as on openSUSE.

Test with : https://github.com/vkohaupt/vokoscreenNG

Operating System: openSUSE Tumbleweed 20220628
KDE Plasma Version: 5.25.1
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.2
Kernel Version: 5.18.6-1-default (64-bit)
Graphics Platform: Wayland
Processors: 8 ������ 11th Gen Intel������ Core��������� i7-1165G7 @ 2.80GHz
Memory: 7.5 Gio of RAM
Graphics Processor: Mesa Intel������ Xe Graphics
Manufacturer: Micro-Star International Co., Ltd.
Product Name: Modern 15 A11M
System Version: REV:1.0