Examine source code of UrbanFirefox - red

{
  "theme": {
    "images": {
      "theme_frame": "head_urban_red.jpg"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "UrbanFirefox - red",
  "manifest_version": 2,
  "description": "Urban Firefox [red version] \nCreator <a href=\"https://outgoing.prod.mozaws.net/v1/1ef1d3b86735afdde7921e635511879840344248b39f3e24a47f41cd31a1380f/http%3A//twitter.com/willskz\" rel=\"nofollow\">http://twitter.com/willskz</a> \nWait for some new versions!"
}