Examine source code of Bright Bird Collage

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#251a09",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Bright Bird Collage",
  "manifest_version": 2,
  "description": "collage of bright birds, love birds, parrots, owl, hummingbirds, colorful, colors, forest, woods, jungle,\n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/712b5d227116cb7bb85ed724853928265757c2fbdebb9984d83846179309aa81/http%3A//animals.desktopnexus.com/wallpaper/1477469/\">http://animals.desktopnexus.com/wallpaper/1477469/</a>"
}