Examine source code of MurkFox

{
  "theme": {
    "images": {
      "theme_frame": "Murk-Empire-Persona-MurkFox-Header.png"
    },
    "colors": {
      "frame": "#f58f00",
      "tab_background_text": "#fc7e00"
    }
  },
  "version": "2.0",
  "name": "MurkFox",
  "manifest_version": 2,
  "description": "The third Murk Empire Persona for FireFox, called \"MurkFox\".\nFor more informations about the Murk Empire, feel free to visit us at: <a href=\"https://outgoing.prod.mozaws.net/v1/ecab53488237938067ddfc4c92747cc24609a17d58453fdf7119175303124769/http%3A//avatars.imvu.com/MurkEmpire\" rel=\"nofollow\">http://avatars.imvu.com/MurkEmpire</a>"
}