Examine source code of Sunset Windmill

{
  "theme": {
    "images": {
      "theme_frame": "SunsetWindMillH.jpg"
    },
    "colors": {
      "frame": "#f05933",
      "tab_background_text": "#ffff1b"
    }
  },
  "version": "2.0",
  "name": "Sunset Windmill",
  "manifest_version": 2,
  "description": "sunset, bright, country, farm, windmill, sky, night, light"
}