Examine source code of ZozorLight

{
  "theme": {
    "images": {
      "theme_frame": "1.jpg"
    },
    "colors": {
      "frame": "#c9c9c9",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "ZozorLight",
  "manifest_version": 2,
  "description": "<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/e47d2ad298336c512041e8bdee239d7fc0d76f07fa5a351d22a3b64e8e6ad1da/http%3A//www.siteduzero.com\">http://www.siteduzero.com</a>"
}