Examine source code of Endwelt

{
  "theme": {
    "images": {
      "theme_frame": "Unbenannt-1.jpg"
    },
    "colors": {
      "frame": "#616161",
      "tab_background_text": "#3b3b3b"
    }
  },
  "version": "2.0",
  "name": "Endwelt",
  "manifest_version": 2,
  "description": "vom Browsergame Endwelt\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/a9c93b0f2d26bb2a46a44f19740e49ae67e028575e0ddbeaa959ef818b8d8f34/http%3A//www.endwelt.com/signups/add%3Frefid=6383\">http://www.endwelt.com/signups/add?refid=6383</a>"
}