Examine source code of WoW Firefox Persona

{
  "theme": {
    "images": {
      "theme_frame": "header2.png"
    },
    "colors": {
      "frame": "#222222",
      "tab_background_text": "#222222"
    }
  },
  "version": "2.0",
  "name": "WoW Firefox Persona",
  "manifest_version": 2,
  "description": "Firefox Persona to use along with WoW GTK theme by ~nale12 [<a href=\"https://outgoing.prod.mozaws.net/v1/a95679e417de90420bd9970c85872efe6c95720bfcb4f433c1b4755e656b7f90/http%3A//nale12.deviantart.com/art/WoW-164793330\" rel=\"nofollow\">http://nale12.deviantart.com/art/WoW-164793330</a>]\n///\nEDIT. I realized this theme only works with small icons and the Hide Menubar extension."
}