Examine source code of Cockatiel Cute

{
  "theme": {
    "images": {
      "theme_frame": "cockatiel2.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Cockatiel Cute",
  "manifest_version": 2,
  "description": "a cute cockatiel on a multihued blue background\n\nbird from <a href=\"https://outgoing.prod.mozaws.net/v1/8920f5e4ef0203213fdc929cf7859b9a48e6391bf80150bf5ceff24d97b13d8b/http%3A//birdorable.com\" rel=\"nofollow\">birdorable.com</a>"
}