Examine source code of Extreme JugendEvent

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_LABS.jpg"
    },
    "colors": {
      "frame": "#bab8b8",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Extreme JugendEvent",
  "manifest_version": 2,
  "description": "Extreme Jugendevent. \n\n<a href=\"https://outgoing.prod.mozaws.net/v1/f41eaaba2521d8345606ad5ef4049dd18def4f96a9e4fc91b22c8ae7cffa11d7/http%3A//www.extreme-events.at\" rel=\"nofollow\">http://www.extreme-events.at</a>"
}