Examine source code of Guthrum

{
  "theme": {
    "images": {
      "theme_frame": "Guthrum_header.jpg"
    },
    "colors": {
      "frame": "#28c900",
      "tab_background_text": "#028c00"
    }
  },
  "version": "2.0",
  "name": "Guthrum",
  "manifest_version": 2,
  "description": "A Firefox Persona for the one-man Epic Blackened Folk Metal band Guthrum, hailing from East Yorkshire, England. More information can be found at <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/2a8eafa9f1b8f49f7fde80235956e0533bb70acdf6e928988f4a19fe897302c5/http%3A//www.myspace.com/guthrumuk\">http://www.myspace.com/guthrumuk</a>"
}