Examine source code of Albi 2011

{
  "theme": {
    "images": {
      "theme_frame": "firefox-top1.jpg"
    },
    "colors": {
      "frame": "#216d9c",
      "tab_background_text": "#216d9c"
    }
  },
  "version": "2.0",
  "name": "Albi 2011",
  "manifest_version": 2,
  "description": "Albi patrimoine mondial de l'UNESCO"
}