u/Firm-Entrepreneur662

Hi, I'm having an issue with Brave browser on Kubuntu 26.04 / KDE Plasma 6 (Wayland). The font in the browser UI (tabs, address bar) looks completely different and ugly compared to the rest of the system, while web content renders fine.

What I've tried:

• Fixed gtk-font-name in ~/.config/gtk-3.0/settings.ini and gtk-4.0/settings.ini (was Sans Serif, 11, now Ubuntu 11)
• Created ~/.config/fontconfig/fonts.conf with rgba/lcdfilter/antialias settings + aliases for sans-serif and system-ui → Ubuntu
• fc-match sans-serif and fc-match system-ui both correctly resolve to Ubuntu
• Tried forcing --ozone-platform=x11 flag
• Cleared Brave cache

What I noticed:

• The logs show hundreds of TextRunHarfBuzz error: font: '', glyph_count: 0 on startup
• brave://settings/fonts fixes web content fonts but has no effect on the browser UI (tabs, toolbar)
• Ubuntu font installed is the variable font version Ubuntu[wdth,wght].ttf

Brave version: 1.90.128 Chromium 148
Plasma: 6.6.4
Session: Wayland

Any ideas?