Examine source code of HappyHardcoreAT

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_HHCat.jpg"
    },
    "colors": {
      "frame": "#970202",
      "tab_background_text": "#970202"
    }
  },
  "version": "2.0",
  "name": "HappyHardcoreAT",
  "manifest_version": 2,
  "description": "Persona made for <a href=\"https://outgoing.prod.mozaws.net/v1/f9c6eaed3d30302e082bdee5f59248729835716564c1de9e154ed077c256033f/http%3A//HappyHardcore.at\" rel=\"nofollow\">HappyHardcore.at</a> - THE UK / FREEFORM Forum in Austria... :-)"
}