Examine source code of Carrick

{
  "theme": {
    "images": {
      "theme_frame": "CarrickFirefox1.jpg"
    },
    "colors": {
      "frame": "#00257b",
      "tab_background_text": "#009ee0"
    }
  },
  "version": "2.0",
  "name": "Carrick",
  "manifest_version": 2,
  "description": "Firefox theme based on the new Carrick website – <a href=\"https://outgoing.prod.mozaws.net/v1/edf28831d7607925fa4ecf6da47eb97be96ca16495b5d512623e447eecbb02a5/http%3A//carrickdp.co.uk\" rel=\"nofollow\">carrickdp.co.uk</a>"
}