Examine source code of Winter Special

{
  "theme": {
    "images": {
      "theme_frame": "WinterSpecialHCustom.jpg"
    },
    "colors": {
      "frame": "#003333",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Winter Special",
  "manifest_version": 2,
  "description": "abstract, aqua, blue, Christmas, cyan, holiday, snowflakes, stars, teal, turquoise, winter My wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/889eeaf26db03f2d84b80cb6c635dc08c62f7a4e4c7daa84de84b8fce4c896d5/http%3A//abstract.desktopnexus.com/wallpaper/906104/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/906104/</a>"
}