anchor.diff:      xorg.libX11 xorg.libXrender xorg.libXft xorg.libXt file
       libnotify xorg.pixman yasm libGLU libGL
       xorg.libXScrnSaver xorg.xorgproto
  -    xorg.libXext sqlite unzip makeWrapper
  -    libevent libstartup_notification libvpx /* cairo */
  +    xorg.libXext unzip makeWrapper
  +    libevent libstartup_notification /* cairo */
       icu libpng jemalloc glib
       nasm
       # >= 66 requires nasm for the AV1 lib dav1d
  
positive.code:     "--with-system-nspr"
      "--with-system-nss"
    ]
    ++ lib.optional (stdenv.isDarwin) "--disable-xcode-checks"
    ++ lib.optionals (lib.versionOlder ffversion "69") [
      "--enable-webrender=build"
  
negative.code:     "--with-system-icu"
      "--enable-system-ffi"
      "--enable-system-pixman"
      #"--enable-system-cairo"
      "--enable-startup-notification"
      #"--enable-content-sandbox" # TODO: probably enable after 54
  