Examine source code of BMW E34 www.e34.de

{
  "theme": {
    "images": {
      "theme_frame": "E34Firefox1.jpg"
    },
    "colors": {
      "frame": "#d61515",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "BMW E34 www.e34.de",
  "manifest_version": 2,
  "description": "Persona zu <a href=\"https://outgoing.prod.mozaws.net/v1/feceb6029a6e5f8034eb10d967025945d48331d95cd2d0a9ba6d6c473fa2a7ce/http%3A//www.e34.de\" rel=\"nofollow\">www.e34.de</a> by Morderroth"
}