Examine source code of Rainbow Kitty

{
  "theme": {
    "images": {
      "theme_frame": "RainbowKittyPersonaHeader.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#330099"
    }
  },
  "version": "2.0",
  "name": "Rainbow Kitty",
  "manifest_version": 2,
  "description": "Rainbow background by diongillard <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/1c8fc31678e4c2a24706bbee155ef6b2edaca94deca4bb9225c63ae64a24e706/http%3A//www.flickr.com/photos/diongillard/277060957/\">http://www.flickr.com/photos/diongillard/277060957/</a> Used under Creative Commons license.\n\nRainbow kitty photo by woofiegrrl <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/32fcd41a10bdecf6ad5438cd2b95500515b14da550935a44707e1f94c7a988c1/http%3A//www.flickr.com/photos/meredith/74972719/in/datetaken\">http://www.flickr.com/photos/meredith/74972719/in/datetaken</a>"
}