Examine source code of Twenty Three Ten

{
  "theme": {
    "images": {
      "theme_frame": "twentythreeten-header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Twenty Three Ten",
  "manifest_version": 2,
  "description": "Twenty Three Ten - Graphic Design Studio\n\n<a href=\"https://outgoing.prod.mozaws.net/v1/652731708e557fd9e62cd0803630b120882071160269e22d1f727a0c3ae78b44/http%3A//www.23ten.co.uk\" rel=\"nofollow\">http://www.23ten.co.uk</a>"
}