Examine source code of Pebbled

{
  "theme": {
    "images": {
      "theme_frame": "header1.PNG"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "Pebbled",
  "manifest_version": 2,
  "description": "this persona is based on my web design at <a href=\"https://outgoing.prod.mozaws.net/v1/9e7bd1994e9ce3b20b6473c4ab49c3dc93580cd162d9b1e9a50696eb99dd508b/http%3A//www.warrenwoodhouse.co.cc/\" rel=\"nofollow\">http://www.warrenwoodhouse.co.cc/</a> - this background is made by me and is stylish and tidy."
}