Examine source code of The Planet Earth

{
  "theme": {
    "images": {
      "theme_frame": "Untitled_image2"
    },
    "colors": {
      "frame": "#33d130",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "The Planet Earth",
  "manifest_version": 2,
  "description": "...."
}