anchor.diff:      ''
       }
   
  +    mkdir -p $out/share/icons
  +    ln -s "$out/lib/firefox-35.0.1/browser/icons/mozicon128.png" "$out/share/icons/firefox.png"
  +
       mkdir -p $out/share/applications
       cp $desktopItem/share/applications/* $out/share/applications
   
  
positive.code:   desktopItem = makeDesktopItem {
      name = browserName;
      exec = browserName + " %U";
      icon = icon;
      comment = "";
      desktopName = desktopName;
      genericName = "Web Browser";
  
negative.code:       "text/html"
        "text/xml"
        "application/xhtml+xml"
        "application/vnd.mozilla.xul+xml"
        "x-scheme-handler/http"
        "x-scheme-handler/https"
        "x-scheme-handler/ftp"
      ];
    };
  
  