Examine source code of WorldOfKungfu

{
  "theme": {
    "images": {
      "theme_frame": "WorldOfKungfuFirefox.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "WorldOfKungfu",
  "manifest_version": 2,
  "description": "The World of Kung Fu is a 3D MMORPG for the PC. Based on traditional Chinese culture, the game takes place in a mythical land founded on the ancient Kung Fu moral values of justice and heroism."
}