Examine source code of wirap.de

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_WIRAPKopie.jpg"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#3b3939"
    }
  },
  "version": "2.0",
  "name": "wirap.de",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/d07aafaae04572fee86a03d18d6c5a01f302152271f7c2cd8ebc520565995fe8/http%3A//wirap.de\" rel=\"nofollow\">wirap.de</a> support persona for firefox users"
}