Examine source code of USA-Reisen.de

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "USA-Reisen.de",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/7da681f7b88acf30bbd82ff0ce0227d9e942f15b8838f13cb16dd037b4260f7c/http%3A//USA-Reisen.de\" rel=\"nofollow\">USA-Reisen.de</a> Persona"
}