Examine source code of osu promotional

{
  "theme": {
    "images": {
      "theme_frame": "osu_header9.png"
    },
    "colors": {
      "frame": "#ff9ef4",
      "tab_background_text": "#020080"
    }
  },
  "version": "2.0",
  "name": "osu promotional",
  "manifest_version": 2,
  "description": "osu! - <a href=\"https://outgoing.prod.mozaws.net/v1/bb2bd9265bd42d59f80904944ebbb3add1038d509e91fc0e72b81ca18cdeb82f/http%3A//osu-me.com\" rel=\"nofollow\">http://osu-me.com</a> - Freeware rhythm game!"
}