Examine source code of Nature ANIMATED

{
  "theme": {
    "images": {
      "theme_frame": "pond-head.png"
    },
    "colors": {
      "frame": "#bab8b8",
      "tab_background_text": "#faf7f7"
    }
  },
  "version": "2.0",
  "name": "Nature ANIMATED",
  "manifest_version": 2,
  "description": "Animation of water droplets in pond.\nAhhhhhh blisssss!\nWhite text on vegetation backdrop.\nAll the best.\nDay."
}