Examine source code of Alien Planet

{
  "theme": {
    "images": {
      "theme_frame": "header172.jpg"
    },
    "colors": {
      "frame": "#d9d6d6",
      "tab_background_text": "#f7f2f2"
    }
  },
  "version": "2.0",
  "name": "Alien Planet",
  "manifest_version": 2,
  "description": "Alien world in another solar system."
}