{ prev, final, ... }:
{
  firefox = prev.firefox.overrideAttrs (old: {
    nativeBuildInputs = (old.nativeBuildInputs or []) ++ (with prev; [ zip unzip gnused ] );
    buildCommand = ''
      export buildRoot="$(pwd)"
    '' + old.buildCommand + ''
      pushd $buildRoot
      unzip $out/lib/firefox/browser/omni.ja -d patched_omni || true
      rm $out/lib/firefox/browser/omni.ja
      cd patched_omni
      sed -i 's/"enterprise_only"\s*:\s*true,//' modules/policies/schema.sys.mjs
      zip -0DXqr $out/lib/firefox/browser/omni.ja * # potentially qr9XD
      popd
    '';
  });
}