Examine source code of Forever Young by MaDonna

{
  "theme": {
    "images": {
      "theme_frame": "ForeverYoungH.jpg"
    },
    "colors": {
      "frame": "#969696",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Forever Young by MaDonna",
  "manifest_version": 2,
  "description": "Thanks to Peter Williams for the use of his beautiful art: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/140bf20e8c5c18d376e69bfaa5bd759d2e734ba747e9b24d40ea973ea7989e8d/http%3A//www.mightyfineart.co.uk/\">http://www.mightyfineart.co.uk/</a>\n\nTheme designed by MaDonna"
}