Examine source code of Mist and Mountains

{
  "theme": {
    "images": {
      "theme_frame": "H.jpg"
    },
    "colors": {
      "frame": "#bdb7b7",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Mist and Mountains",
  "manifest_version": 2,
  "description": "fog, foggy, mist, misty, mountains, nature, sky, trees, morning, birds, My wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/a0f54bb70b3a2e2d94d72d83b5fca761cc14905c0ab2403c3dcf3d08e2acf6eb/http%3A//nature.desktopnexus.com/wallpaper/922100/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/922100/</a>"
}