Examine source code of Spring Arrives

{
  "theme": {
    "images": {
      "theme_frame": "springarrivesHCustom.jpg"
    },
    "colors": {
      "frame": "#99cc99",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Spring   Arrives",
  "manifest_version": 2,
  "description": "bird, field, flowers, grass, nature, nest, sky, spring, summer My wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/3ca9c6b3666c849a7fb414342530defd28eff0bbea8bb6b5a195dbc71a098f4c/http%3A//nature.desktopnexus.com/wallpaper/985294/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/985294/</a>"
}