Examine source code of kliniken.de

{
  "theme": {
    "images": {
      "theme_frame": "header4.png"
    },
    "colors": {
      "frame": "#8c1e23",
      "tab_background_text": "#10451f"
    }
  },
  "version": "2.0",
  "name": "kliniken.de",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/0a923aa0ce02cf43646a6a74d4e77b36aad43eb7f88875e45b9653e060444ed9/http%3A//www.kliniken.de\" rel=\"nofollow\">http://www.kliniken.de</a>"
}