Examine source code of Marillion 2013

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#333333",
      "tab_background_text": "#fafafa"
    }
  },
  "version": "2.0",
  "name": "Marillion 2013",
  "manifest_version": 2,
  "description": "A Theme with the Marillion 2013 wallpaper.\n\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/461a7d69f2dcb27da41aa867b288616c118be4cd7bb075f360815c008e9737ed/http%3A//marillion.com/free.htm\">Download it free</a>"
}