Examine source code of Easter Egg Chick

{
  "theme": {
    "images": {
      "theme_frame": "easter_egg_chick.jpg"
    },
    "colors": {
      "frame": "#969696",
      "tab_background_text": "#555557"
    }
  },
  "version": "2.0",
  "name": "Easter Egg Chick",
  "manifest_version": 2,
  "description": "Download a matching wallpaper at <a href=\"https://outgoing.prod.mozaws.net/v1/fc53d4b831aa5a00e8009e4ee50e66f9d45a9da4d94462963a13933edc6277f2/http%3A//wagooh.net/freebies/easter-egg-chick\" rel=\"nofollow\">http://wagooh.net/freebies/easter-egg-chick</a>"
}