Font issues with the browsers installed using Flatpak

Font issues with the Flatpak versions of browsers like Brave, Firefox, and Google Chrome are common because the sandboxed applications cannot access system fonts. Using Flatseal to grant filesystem permissions usually resolves this.

Install the Flatseal app

Either use the software centre to install the app. Otherwise, apply the following command to install the Flatseal app,

flatpak install flathub com.github.tchx84.Flatseal

Run the app using the following command,

flatpak run com.github.tchx84.Flatseal

Select the browser, e.g. Chrome Flatpak. Scroll down to Filesystem. Under Other files, add the following paths:

xdg-config/fontconfig

~/.local/share/fonts

Restart the browser.