Examine source code of The Earth

{
  "theme": {
    "images": {
      "theme_frame": "earth.jpg"
    },
    "colors": {
      "frame": "#1e26fa",
      "tab_background_text": "#06159e"
    }
  },
  "version": "2.0",
  "name": "The Earth",
  "manifest_version": 2,
  "description": "Our Earth"
}