Examine source code of WebPT

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#136590",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "WebPT",
  "manifest_version": 2,
  "description": "A theme created for users of the WebPT web-based EMR system.  The toolbar, background and text colors are set to match the WebPT color scheme.  Additional features are planned so in the form of web extensions! For FF Quantum upload our custom theme here. <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/da090f313ac1e93d031d308d241bc3be143d9b4b8abba35dd038e088f690bda9/http%3A//tinyurl.com/yb9ul4am\">http://tinyurl.com/yb9ul4am</a>"
}