Examine source code of htmlcss wiki bg

{
  "theme": {
    "images": {
      "theme_frame": "Persona-Header.png"
    },
    "colors": {
      "frame": "#ffff00",
      "tab_background_text": "#ffff00"
    }
  },
  "version": "2.0",
  "name": "htmlcss wiki bg",
  "manifest_version": 2,
  "description": "The background image used for <a href=\"https://outgoing.prod.mozaws.net/v1/93e223bf1645a43e85c495675bca3d3856a8380a63dcb8bd70aaf5bbdb49f4d1/http%3A//htmlcss.wikia.com\" rel=\"nofollow\">http://htmlcss.wikia.com</a>. It was created by SSgtGriffin."
}