Examine source code of Christmas Canes

{
  "theme": {
    "images": {
      "theme_frame": "12.png"
    },
    "colors": {
      "frame": "#53b2c6",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Christmas Canes",
  "manifest_version": 2,
  "description": "Download the matching Christmas wallpaper at:\n<a href=\"https://outgoing.prod.mozaws.net/v1/f6e4f07b59af82076ab91925ff7ec3c7076aec59ede48ba212c742f785e13000/http%3A//wagooh.net/freebies/christmas-canes\" rel=\"nofollow\">http://wagooh.net/freebies/christmas-canes</a>"
}