Examine source code of Twilighter Welt

{
  "theme": {
    "images": {
      "theme_frame": "firefoxweltdertwilighterpfotedifusohnelogo.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#e8d3d3"
    }
  },
  "version": "2.0",
  "name": "Twilighter Welt",
  "manifest_version": 2,
  "description": "Our own Design for <a href=\"https://outgoing.prod.mozaws.net/v1/db7d87ad35b5d74f9d96ea2303ee35d22be03e9721c2ef5fef57faefceed4578/http%3A//twilighter-welt.yooco.de/beta/\" rel=\"nofollow\">http://twilighter-welt.yooco.de/beta/</a>"
}