Examine source code of The Out Campaign

{
  "theme": {
    "images": {
      "theme_frame": "out-header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#d1d1d1"
    }
  },
  "version": "2.0",
  "name": "The Out Campaign",
  "manifest_version": 2,
  "description": "Atheists have always been at the forefront of rational thinking and beacons of enlightenment, and now you can share your idealism by being part of the OUT Campaign.\n\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/94fc49d9be1a15c712173b9ec4f94bcc2577f0fe45fb3dea523057b05ea0656b/http%3A//outcampaign.org/\">http://outcampaign.org/</a>"
}