fonts.conf

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <selectfont>
    <rejectfont>
      <pattern>
        <patelt name="family" >
          <string>Noto Emoji</string>
        </patelt>
      </pattern>
    </rejectfont>
    <rejectfont>
      <pattern>
        <patelt name="family" >
          <string>Liberation Mono</string>
        </patelt>
      </pattern>
    </rejectfont>
    <rejectfont>
      <glob>
        *DejaVu*.ttf
      </glob>
    </rejectfont>
  </selectfont>

  <alias>
    <family>sans-serif</family>
    <prefer>
      <family>Bitstream Vera Sans</family>
    </prefer>
  </alias>

  <alias>
    <family>serif</family>
    <prefer>
      <family>Bitstream Vera Serif</family>
    </prefer>
  </alias>

  <alias>
    <family>monospace</family>
    <prefer>
      <family>Fixedsys Excelsior 3.01</family>
    </prefer>
  </alias>

  <!-- some sites are broken wrt emoji coming before normal fonts, this makes some work better -->
  <alias>
    <family>emoji</family>
    <prefer>
      <family>Twitter Color Emoji</family>
    </prefer>
  </alias>

  <alias binding="strong">
    <family>Ubuntu</family>
    <prefer>
      <family>Bitstream Vera Sans</family>
    </prefer>
  </alias>

  <!-- Alias requests for the other emoji fonts -->
  <alias binding="strong">
    <family>Apple Color Emoji</family>
    <prefer><family>Twitter Color Emoji</family></prefer>
    <default><family>sans-serif</family></default>
  </alias>
  <alias binding="strong">
    <family>Segoe UI Emoji</family>
    <prefer><family>Twitter Color Emoji</family></prefer>
    <default><family>sans-serif</family></default>
  </alias>
  <alias binding="strong">
    <family>Noto Color Emoji</family>
    <prefer><family>Twitter Color Emoji</family></prefer>
    <default><family>sans-serif</family></default>
  </alias>
</fontconfig>