Examine source code of This Blue Planet

{
  "theme": {
    "images": {
      "theme_frame": "blueplanet_header.jpg"
    },
    "colors": {
      "frame": "#2c305e",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "This Blue Planet",
  "manifest_version": 2,
  "description": "galaxy planet earth sky cosmos universe stars astrology space spaceship sun star northern light nature sea water hemisphere sterne erde green planet"
}