anchor.diff:  
     firefox-unwrapped = common {
       pname = "firefox";
  -    version = "52.0.2";
  -    sha512 = "15668625d212acf874b560d0adf738faf3e0df532c549ab94e1d91944542e13bf16265f08fca1eded42820f9b7ad3f0ff70a8b5bc9adde0a79d11e022bb1158e";
  +    version = "53.0";
  +    sha512 = "36ec810bab58e3d99478455a38427a5efbc74d6dd7d4bb93b700fd7429b9b89250efd0abe4609091483991802090c6373c8434dfc9ba64c79a778e51fd2a2886";
       updateScript = import ./update.nix {
         attrPath = "firefox-unwrapped";
         inherit writeScript lib common-updater-scripts xidel coreutils gnused gnugrep curl;
  
positive.code: , yasm, mesa, sqlite, unzip, makeWrapper
  , hunspell, libevent, libstartup_notification, libvpx
  , cairo, gstreamer, gst-plugins-base, icu, libpng, jemalloc, libpulseaudio
  , autoconf213, which
  , writeScript, xidel, common-updater-scripts, coreutils, gnused, gnugrep, curl
  , enableGTK3 ? false, gtk3, wrapGAppsHook
  , debugBuild ? false
  
negative.code:     ++ lib.optional enableGTK3 gtk3
      ++ lib.optionals (!passthru.ffmpegSupport) [ gstreamer gst-plugins-base ];
  
    nativeBuildInputs =
      [ autoconf213 which gnused pkgconfig perl python cargo rustc ]
      ++ lib.optional enableGTK3 wrapGAppsHook;
  
    configureFlags =
      [ "--enable-application=browser"
  