Examine source code of Foo Fighters Gold Edition

{
  "theme": {
    "images": {
      "theme_frame": "head.png"
    },
    "colors": {
      "frame": "#ff9c12",
      "tab_background_text": "#fff9a8"
    }
  },
  "version": "2.0",
  "name": "Foo Fighters Gold Edition",
  "manifest_version": 2,
  "description": "The Best Rock Band since 90'\n\nA tip: Go to the Option menu of your Firefox and change the Font to the TW Cen MT, to looks like the Official Band Site"
}