Examine source code of Bird clouds

{
  "theme": {
    "images": {
      "theme_frame": "bird_header.jpg"
    },
    "colors": {
      "frame": "#211d03",
      "tab_background_text": "#ebe5d3"
    }
  },
  "version": "2.0",
  "name": "Bird clouds",
  "manifest_version": 2,
  "description": "antique birds"
}