Examine source code of Doberman Chat

{
  "theme": {
    "images": {
      "theme_frame": "dc_persona2.jpg"
    },
    "colors": {
      "frame": "#f20808",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Doberman Chat",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/481a563adb9809e3854a966a219005f92c38b820fd2438338af350ec8366a8b1/http%3A//www.doberman-chat.com\" rel=\"nofollow\">www.doberman-chat.com</a>"
}