Examine source code of Summer Things by MaDonna

{
  "theme": {
    "images": {
      "theme_frame": "SummerThingsH3.jpg"
    },
    "colors": {
      "frame": "#f5edda",
      "tab_background_text": "#212020"
    }
  },
  "version": "2.0",
  "name": "Summer Things by MaDonna",
  "manifest_version": 2,
  "description": "My matching wallpaper can be found at: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/f769dbc22bef4f26ff9d1680b99b16dc43ad2b4c51cd51959a02fc52be102326/http%3A//nature.desktopnexus.com/wallpaper/632338/\">http://nature.desktopnexus.com/wallpaper/632338/</a>"
}