Examine source code of Gathering Blossoms

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#e8eee4",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Gathering Blossoms",
  "manifest_version": 2,
  "description": "Designed by MaDonna\n\nMy wallpaper to match is at: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/bff35f679d1ac1076c02c650be2797b554963131884f27a1e0f2f4abf7deaea2/http%3A//nature.desktopnexus.com/wallpaper/1618407/\">http://nature.desktopnexus.com/wallpaper/1618407/</a>"
}