Examine source code of Under water Devil

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#461787"
    }
  },
  "version": "2.0",
  "name": "Under water Devil",
  "manifest_version": 2,
  "description": "How would you feel if you saw an eye as big as a ship staring from underwater at YOU?"
}