Examine source code of Dubset

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Dubset",
  "manifest_version": 2,
  "description": "Dubset | DJ Defined Radio\n<a href=\"https://outgoing.prod.mozaws.net/v1/43c32f82b5041aa8f5d01c124e332e394121ef1070dbd6378caa6860b1630184/http%3A//dubset.com\" rel=\"nofollow\">http://dubset.com</a>"
}