Examine source code of Fill The Sleigh

{
  "theme": {
    "images": {
      "theme_frame": "FilletheSleighHCustom.jpg"
    },
    "colors": {
      "frame": "#b3d0f2",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Fill The Sleigh",
  "manifest_version": 2,
  "description": "Christmas, sleigh, red sleigh, reindeer, snow, winter, trees, sky, holiday, cold, Santa, My wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/f560909ca80e6650a2b86c63e5f8bfd5e721541ac56ca58e57549139f9a9e4cd/http%3A//nature.desktopnexus.com/wallpaper/849222/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/849222/</a>"
}