Examine source code of blue skull swirl

{
  "theme": {
    "images": {
      "theme_frame": "ffpersona_blue_skull_top.jpg"
    },
    "colors": {
      "frame": "#4be6fa",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "blue skull swirl",
  "manifest_version": 2,
  "description": "skull background with swirls : Mildly edited image from an incredible deviant art artist, Xyrus02 - See more of his work here: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/57b4efd761ae4609bebef9029d17f8f888ae4e1052dbb609ba36f869f00e077a/http%3A//xyrus02.deviantart.com/gallery/\">http://xyrus02.deviantart.com/gallery/</a>"
}