Examine source code of Wild Horse

{
  "theme": {
    "images": {
      "theme_frame": "horse.jpg"
    },
    "colors": {
      "frame": "#2bc25d",
      "tab_background_text": "#242a26"
    }
  },
  "version": "2.0",
  "name": "Wild Horse",
  "manifest_version": 2,
  "description": "Wild horse of the Outer Banks by skye820, <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/5812a3b64b284a154a4c05cba0ecae97b9e1954577f4086c0cff3811e6aa41d2/http%3A//www.flickr.com/photos/skye820/889739136/\">http://www.flickr.com/photos/skye820/889739136/</a>"
}