Examine source code of Mia - red tabby

{
  "theme": {
    "images": {
      "theme_frame": "45_top.jpg"
    },
    "colors": {
      "frame": "#ff6f00",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Mia - red tabby",
  "manifest_version": 2,
  "description": "From my picture: \n\n<a href=\"https://outgoing.prod.mozaws.net/v1/9660a85182e22a8379e49ecf8b1f46d7dd4d8d9dc8afb9924f5866d23522cb55/http%3A//www.flickr.com/photos/zamm/76893310/in/set-1637281\" rel=\"nofollow\">http://www.flickr.com/photos/zamm/76893310/in/set-1637281</a>"
}