Examine source code of Summer Scene

{
  "theme": {
    "images": {
      "theme_frame": "summerscene3Custom.jpg"
    },
    "colors": {
      "frame": "#030303",
      "tab_background_text": "#050505"
    }
  },
  "version": "2.0",
  "name": "Summer Scene",
  "manifest_version": 2,
  "description": "art, creek, spring, stream, plants, log, parrot, bird, flowers, vines, summer, spring, My desktop wallpaper that matches can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/5a74b2c26801ef932449b9b0f3419db04c0c8b1fe4f35d3633e925b54b6247ea/http%3A//nature.desktopnexus.com/wallpaper/627070/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/627070/</a>"
}