Examine source code of ElCarter.com

{
  "theme": {
    "images": {
      "theme_frame": "fierfox-banner-6-good.jpg"
    },
    "colors": {
      "frame": "#858585",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "ElCarter.com",
  "manifest_version": 2,
  "description": "The official theme of <a href=\"https://outgoing.prod.mozaws.net/v1/b0f4fcdbad8cf14706e95d90941670ec100f95b26481baa8637e6519f403ade4/http%3A//ElCarter.com\" rel=\"nofollow\">ElCarter.com</a>"
}