Examine source code of Underwater world

{
  "theme": {
    "images": {
      "theme_frame": "underwaterup.jpg"
    },
    "colors": {
      "frame": "#030303",
      "tab_background_text": "#52bfab"
    }
  },
  "version": "2.0",
  "name": "Underwater world",
  "manifest_version": 2,
  "description": "fish aquarium oceanarium ocean sea underwater under water coral sea-life urchin anenome"
}