Examine source code of Starry Starry Night

{
  "theme": {
    "images": {
      "theme_frame": "hdr.jpg"
    },
    "colors": {
      "frame": "#d6d6d6",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Starry Starry Night",
  "manifest_version": 2,
  "description": "It's a Starry Starry Night!"
}