Examine source code of Twilight Flight

{
  "theme": {
    "images": {
      "theme_frame": "twilgightflightH2.jpg"
    },
    "colors": {
      "frame": "#96a6f5",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Twilight Flight",
  "manifest_version": 2,
  "description": "birds, blue, eagle, evening, flight, fog, grass, hawk, lavender, mist, mountains, shine, sky, spring, summer, sun, trees, twilight\t\n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/0526fe553db6d61d52000f17974be0e432bf05e5d96290ea17dacee288885a1b/http%3A//nature.desktopnexus.com/wallpaper/1157086/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1157086/</a>"
}