Examine source code of FreeBSD Beastie black

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#3b3b3b",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "FreeBSD Beastie black",
  "manifest_version": 2,
  "description": "FreeBSD's daemon on black. The Daemon was created by Poul-Henning Kamp, and released under \"THE BEER-WARE LICENSE\". More info could be found on <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/20a51b109fe4811ee1b0801c1c1703983a769f04d71d286713a47c2c30dc910e/http%3A//www.freebsd.org\">www.freebsd.org</a>"
}