Examine source code of Narts.de

{
  "theme": {
    "images": {
      "theme_frame": "Narts-Head.jpg"
    },
    "colors": {
      "frame": "#8305ad",
      "tab_background_text": "#f7f2f2"
    }
  },
  "version": "2.0",
  "name": "Narts.de",
  "manifest_version": 2,
  "description": "Become a fan of my Facebook page and you will get daily use and testing of new personas\n\nWerde Fan von meiner Facebook Seite und du bekommst täglich neue Personas zu Testen und benutzen\n\n<a href=\"https://outgoing.prod.mozaws.net/v1/516dd05398239c24749424046e59bf73fdf877fab7ad34dc0819a43fb417979a/https%3A//www.facebook.com/FirefoxPersonasByTobias\" rel=\"nofollow\">https://www.facebook.com/FirefoxPersonasByTobias</a>"
}