Examine source code of Websites share QR CODE

{
  "manifest_version": 3,
  "name": "Websites share QR CODE",
  "version": "0.0.1",
  "description": "Share the website you're on with a QR code!",
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "default_locale": "en",
  "icons": {
    "16": "128.png",
    "48": "128.png",
    "128": "128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "monextension@example.com"
    }
  }
}