Examine source code of Cookie Exporter for Wget

{
  "manifest_version": 2,
  "name": "Cookie Exporter for Wget",
  "version": "1.9",
  "description": "Quickly export your browser cookies into a format compatible with wget, making it easier to download resources from websites that require login or authentication. With this extension, you can streamline your workflow and automate processes that rely on cookies, ensuring efficient use of wget for your needs",
  "short_name": "cookies",
  "permissions": [
    "activeTab",
    "cookies",
    "tabs",
    "webNavigation",
    "http://*/*",
    "https://*/*"
  ],
  "browser_action": {
    "default_title": "Export cookies.txt",
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e0347b0a-43dc-427e-9db1-97f814b5c00d}"
    }
  }
}