Examine source code of Very Nice Waterfalls

{
  "theme": {
    "images": {
      "theme_frame": "asd.JPG"
    },
    "colors": {
      "frame": "#6bb1d1",
      "tab_background_text": "#508dc9"
    }
  },
  "version": "2.0",
  "name": "Very Nice Waterfalls",
  "manifest_version": 2,
  "description": "A Beautifull Waterfalls\n"
}