Examine source code of Addicted Crew

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_acrew4.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Addicted Crew",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/06810cc4c9e65519712105144441f9cd6dc45f1fd43ea5a39c294ed5bf625f81/http%3A//www.addicted-crew.de\" rel=\"nofollow\">www.addicted-crew.de</a>"
}