Examine source code of Holiday Fun

{
  "theme": {
    "images": {
      "theme_frame": "3.png"
    },
    "colors": {
      "frame": "#d95655",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Holiday Fun",
  "manifest_version": 2,
  "description": "Download a matching Christmas wallpaper at <a href=\"https://outgoing.prod.mozaws.net/v1/5f2155f7cc7dc361aec028a01c03f02d3a9749653bb342637e9a077d060bf578/http%3A//wagooh.net/freebies/holiday-fun\" rel=\"nofollow\">http://wagooh.net/freebies/holiday-fun</a>"
}