Examine source code of FlyForFun

{
  "theme": {
    "images": {
      "theme_frame": "flyff_itzh_1629x1222_2.jpg"
    },
    "colors": {
      "frame": "#0f8fbd",
      "tab_background_text": "#bcddeb"
    }
  },
  "version": "2.0",
  "name": "FlyForFun",
  "manifest_version": 2,
  "description": "I Flyff"
}