Examine source code of myBritneyInsider

{
  "theme": {
    "images": {
      "theme_frame": "mybritInsider.png"
    },
    "colors": {
      "frame": "#f7ce39",
      "tab_background_text": "#7495f2"
    }
  },
  "version": "2.0",
  "name": "myBritneyInsider",
  "manifest_version": 2,
  "description": "Support a Great Britney Spears fan site.... you all should check it out. <a href=\"https://outgoing.prod.mozaws.net/v1/6381fbfdb37c51164afc61538484da346f7dc3aadf90afe5d4694ddb686c1d2a/http%3A//www.mybritneyinsider.com\" rel=\"nofollow\">www.mybritneyinsider.com</a>"
}