Examine source code of Full Body Hug

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Full Body Hug",
  "manifest_version": 2,
  "description": "Art by Twokinds: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/ac8b0f820735b7b36d2a09763601cbb3ebaef0944a5e0914dbdf6b613d7b271b/http%3A//fav.me/d8nlavo\">http://fav.me/d8nlavo</a>\n\nSomething quick I made."
}