fonts.config to switch from DejaVu to Liberation

README.md

Switch to Liberation from DejaVu for better font-handling in Firefox

Test page: https://en.wikipedia.org/wiki/User:Kaldari/Font_test

Firefox defaults to the system defaults, so it's best to make the change at the system level than in Firefox preferences.

First, check current defaults

for family in serif sans-serif monospace Arial Helvetica Verdana "Times New Roman" "Courier New"; do
  echo -n "$family: "
  fc-match "$family"
done

See: https://jichu4n.com/posts/how-to-set-default-fonts-and-font-aliases-on-linux/

Then set your system defaults by creating ~/.config/fontsconfig/fonts.conf and editing it.

fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<!-- file: $HOME/.config/fontconfig/fonts.conf -->
<fontconfig>
  <!-- Set preferred serif, sans serif, and monospace fonts. -->
  <alias>
    <family>serif</family>
    <prefer><family>Liberation Serif</family></prefer>
  </alias>
  <alias>
    <family>sans-serif</family>
    <prefer><family>Liberation Sans</family></prefer>
  </alias>
  <alias>
    <family>sans</family>
    <prefer><family>Liberation Sans</family></prefer>
  </alias>
  <alias>
    <family>monospace</family>
    <prefer><family>Source Code Pro</family></prefer>
  </alias>
</fontconfig>