Examine source code of Halo Tracker

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#2146a3",
      "tab_background_text": "#19aae8"
    }
  },
  "version": "2.0",
  "name": "Halo Tracker",
  "manifest_version": 2,
  "description": "For all of your Halo 3 and Halo Reach Stats, sign up at <a href=\"https://outgoing.prod.mozaws.net/v1/3c5254cf1c34238662de8c8084ff90a303c204d797a6a61d67669ede42359e0b/http%3A//halotracker.com\" rel=\"nofollow\">halotracker.com</a>"
}