Examine source code of En-Joy.at

{
  "theme": {
    "images": {
      "theme_frame": "firefoxenjoyheader.jpg"
    },
    "colors": {
      "frame": "#ff9900",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "En-Joy.at",
  "manifest_version": 2,
  "description": "Das Firefox Design von <a href=\"https://outgoing.prod.mozaws.net/v1/48fa2f76aca5e552ce9e2ea8b239943bebe2a7f64a462df5bcf84ea7d988477b/http%3A//En-Joy.at\" rel=\"nofollow\">En-Joy.at</a> die Event Page im Almtal"
}