Examine source code of Fox Racing Dirt

{
  "theme": {
    "images": {
      "theme_frame": "fox_racing_dirt_top.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Fox Racing Dirt",
  "manifest_version": 2,
  "description": "brushes from <a href=\"https://outgoing.prod.mozaws.net/v1/02a29bce1d08bd302e52ad84f29fe55b2c35158f04b0ad6f252ecfa1028ccf04/http%3A//www.heygrey.com/\" rel=\"nofollow\">http://www.heygrey.com/</a>"
}