Examine source code of GMod Forums

{
  "theme": {
    "images": {
      "theme_frame": "gmodforumspersona2.png"
    },
    "colors": {
      "frame": "#8c8c8c",
      "tab_background_text": "#bac"
    }
  },
  "version": "2.0",
  "name": "GMod Forums",
  "manifest_version": 2,
  "description": "A persona if you have issues and really want to advertise <a href=\"https://outgoing.prod.mozaws.net/v1/ba186f0c58de81038d4d3ecc31089d332e8328e045f8d3753a9c90d9efacbcb6/http%3A//GModForums.com\" rel=\"nofollow\">GModForums.com</a> to yourself and possibly your relatives."
}