Examine source code of Third-party cookies

{
  "name": "Third-party cookies",
  "version": "2.1",
  "description": "Sample extension which demonstrates how to access a preference.",
  "permissions": [
    "privacy"
  ],
  "browser_action": {
    "default_icon": "16.png",
    "default_popup": "popup.html"
  },
  "manifest_version": 2
}