Examine source code of Spring Wheel

{
  "theme": {
    "images": {
      "theme_frame": "springwheelH2.jpg"
    },
    "colors": {
      "frame": "#99ff99",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Spring Wheel",
  "manifest_version": 2,
  "description": "bird, ducklings, ducks, Easter, eggs, flowers, grass, hatched, spring, summer, wagon wheel, wheel \n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/4f7835e25a4d776cdbd21f87a2f671b0973713d7fef0c7ab651c7e868925f91d/http%3A//animals.desktopnexus.com/wallpaper/1053392/\" rel=\"nofollow\">http://animals.desktopnexus.com/wallpaper/1053392/</a>"
}