Examine source code of Alien Landing

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#4d68c7",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Alien Landing",
  "manifest_version": 2,
  "description": "What will you do when aliens come to our planet? What will they do? Some say eat us, use us for entertainment, remove us since we are killing our own planet. No one knows until the day the arrive."
}