Examine source code of Mozart

{
  "theme": {
    "images": {
      "theme_frame": "banner.jpg"
    },
    "colors": {
      "frame": "#438ecc",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "Mozart",
  "manifest_version": 2,
  "description": "Mozart - from <a href=\"https://outgoing.prod.mozaws.net/v1/f3ea25267299b4cfe5e3fb7367c9173a23e2a8d8647461c35c5bc6cd5a592d3c/http%3A//en.wikipedia.org/wiki/File%3AMozart_%2528unfinished%2529_by_Lange_1782.jpg\" rel=\"nofollow\">http://en.wikipedia.org/wiki/File:Mozart_%28unfinished%29_by_Lange_1782.jpg</a> (public domain)"
}