Examine source code of Mac Guru

{
  "theme": {
    "images": {
      "theme_frame": "firefoxpersona.jpg"
    },
    "colors": {
      "frame": "#6f7c91",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Mac Guru",
  "manifest_version": 2,
  "description": "Mac Guru's Official Firefox Persona. <a href=\"https://outgoing.prod.mozaws.net/v1/d7032be3578a8a0fd799519160f45de8380c4d37dfff40f500fd907a05e870c2/http%3A//www.helpmemacguru.com/\" rel=\"nofollow\">http://www.helpmemacguru.com/</a>"
}