Examine source code of Gengar Edition

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#5a0c9e"
    }
  },
  "version": "2.0",
  "name": "Gengar Edition",
  "manifest_version": 2,
  "description": "Credits :\nHead image : <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/5143867a756ea36ff89048840f28ab5c7dd811a613e31d63f38cab9a9946160a/http%3A//wallpaper-kid.com/gengar-wallpaper-hd.htm\">http://wallpaper-kid.com/gengar-wallpaper-hd.htm</a>\nfooter image : <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/b57599b8e7bcdc726946c9ad46ee332244221fda522c0593f1311f011b6a7926/http%3A//arumy.deviantart.com/\">http://arumy.deviantart.com/</a>"
}