Examine source code of Celtic Cross by MaDonna

{
  "theme": {
    "images": {
      "theme_frame": "1copy.jpg"
    },
    "colors": {
      "frame": "#8f9c83",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Celtic Cross by MaDonna",
  "manifest_version": 2,
  "description": "© MaDonnas Personas\n\nMy matching desktop wallpaper can be found at: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/0a456f3374750832460c780aa7c56b81567c8d7c0480a60b75842961186a0648/http%3A//nature.desktopnexus.com/wallpaper/608827/\">http://nature.desktopnexus.com/wallpaper/608827/</a>"
}