Examine source code of Light Design

{
  "theme": {
    "images": {
      "theme_frame": "mozilla-tema.jpg"
    },
    "colors": {
      "frame": "#6e6d6a",
      "tab_background_text": "#b1e8e1"
    }
  },
  "version": "2.0",
  "name": "Light Design",
  "manifest_version": 2,
  "description": "Progetti - Didattica - Ricerca\n<a href=\"https://outgoing.prod.mozaws.net/v1/d657ae58ac4166cc6c1853189b3ea8d5ede770452122da045d9016f7585b2ac0/http%3A//www.lightingdesign.it\" rel=\"nofollow\">www.lightingdesign.it</a>\n<a href=\"https://outgoing.prod.mozaws.net/v1/843f156e3ff449b3cc0e98a6430f97ab3265f720eca3c02805886e7177189bc1/http%3A//www.scuoleapedali.it\" rel=\"nofollow\">www.scuoleapedali.it</a>"
}