fontconfig to disable ligatures on Monospace fonts

mononolig.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
<fontconfig>
  <!-- This file wants to reside at ~/.config/fontconfig/conf.d/00-mononolig.conf -->
  <description>Disable ligatures for monospaced fonts to avoid ff, fi, ffi, etc. becoming only one character wide</description>
  <match target="font">
    <test name="family" compare="contains" ignore-blanks="true">
      <string>Mono</string>
    </test>
    <edit name="fontfeatures" mode="append">
      <string>liga off</string>
      <string>dlig off</string>
    </edit>
  </match>
</fontconfig>