Examine source code of No Cookies

{
  "name": "No Cookies",
  "description": "Removes 'Cookie' and 'Set-Cookie' headers.",
  "version": "1.7",
  "manifest_version": 2,
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://*/*",
    "http://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{866ed953-3acc-481d-a44b-5d59621675c1}"
    }
  }
}