Examine source code of Simple Cookie Editor

{
  "manifest_version": 2,
  "name": "Simple Cookie Editor",
  "version": "2.0",
  "applications": {
    "gecko": {
      "id": "TampilkanCookies@firefox-addon"
    }
  },
  "permissions": [
    "cookies",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html"
  }
}