Examine source code of Mental Gamers

{
  "theme": {
    "images": {
      "theme_frame": "FF-bg.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#220810"
    }
  },
  "version": "2.0",
  "name": "Mental Gamers",
  "manifest_version": 2,
  "description": "A simple persona based on the colours of my site <a href=\"https://outgoing.prod.mozaws.net/v1/fe0455eb450fe4dbf59cf8daf27ff45147033e32cdd2295532da7c347916a6a2/http%3A//www.MentalGamers.com\" rel=\"nofollow\">www.MentalGamers.com</a>"
}