Examine source code of Heartsong

{
  "theme": {
    "images": {
      "theme_frame": "Heartsong-Header.jpg"
    },
    "colors": {
      "frame": "#d4ed8e",
      "tab_background_text": "#09170d"
    }
  },
  "version": "2.0",
  "name": "Heartsong",
  "manifest_version": 2,
  "description": "Photoshop brushes (foreground) <a href=\"https://outgoing.prod.mozaws.net/v1/120ebede61a311a652b43d254d4912f44880e744f663f09b78116b2f2697675b/http%3A//www.greenbulbgang.com/\" rel=\"nofollow\">http://www.greenbulbgang.com/</a>  (background) <a href=\"https://outgoing.prod.mozaws.net/v1/444cc2973fe84189c818757a1c7a39f38ebda8d8f39cf45746cc54b17ecfef63/http%3A//browse.deviantart.com/resources/applications/%3Fqh=&amp;section=&amp;q=watercolor%23/d2np6ol\" rel=\"nofollow\">http://browse.deviantart.com/resources/applications/?qh=&amp;section=&amp;q=watercolor#/d2np6ol</a>\nTAGS: bird birds song love sing chirp heart hearts tree branch leaves summer spring yellow sun blue sky green foliage pink pastel soft pretty cute paisley"
}