Examine source code of Earth under Map

{
  "theme": {
    "images": {
      "theme_frame": "rsz_result.jpg"
    },
    "colors": {
      "frame": "#5883f0",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Earth under Map",
  "manifest_version": 2,
  "description": "An image of a map of the earth under night."
}