Examine source code of Cloudv1

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Cloudv1",
  "manifest_version": 2,
  "description": "Inspirado en el tema Cloud para Opera 12 accesible desde <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/76f3352170f0d1932732527efebad5da94d889a2f24807bd0e2a01b9dff484f2/http%3A//addons.opera.com\">addons.opera.com</a>"
}