Examine source code of Leaf Shower

{
  "theme": {
    "images": {
      "theme_frame": "LeafShowerHCustom.jpg"
    },
    "colors": {
      "frame": "#cc9933",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Leaf Shower",
  "manifest_version": 2,
  "description": "autumn, blurred, fall, falling, glow, gold, green, lake, leaves, light, maple, orange, ripples, river, simple, water\t, oak,\n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/c3c44e01cb2d4ffa6c699d43e39f9e469bb63619c075ad7c90b025591bcb152d/http%3A//nature.desktopnexus.com/wallpaper/1200332/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1200332/</a>"
}