Examine source code of FIFA World Cup

{
  "theme": {
    "images": {
      "theme_frame": "FIFA-header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "FIFA World Cup",
  "manifest_version": 2,
  "description": "\"FIFA World Cup\" - Matching wallpaper here <a href=\"https://outgoing.prod.mozaws.net/v1/2e0d0647079b508e726e893dd8bfd81a6a8101595e6c0e9d930e04418e00665d/http%3A//wallpaperswide.com/fifa_world_cup-wallpapers.html\" rel=\"nofollow\">http://wallpaperswide.com/fifa_world_cup-wallpapers.html</a>"
}