Examine source code of Maps Lead Extractor

{
  "manifest_version": 3,
  "name": "Maps Lead Extractor",
  "version": "4.0.2",
  "description": "Extract Google Maps business leads locally. Multi-keyword, quality filters, email extraction, CSV export. No cloud. No account. No subscription.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "downloads"
  ],
  "host_permissions": [
    "*://*.google.com/maps*",
    "*://*.google.co.uk/maps*",
    "*://*.google.co.in/maps*",
    "*://*.google.ca/maps*",
    "*://*.google.com.au/maps*",
    "*://*.google.de/maps*",
    "*://*.google.fr/maps*",
    "*://*.google.es/maps*",
    "*://*.google.it/maps*",
    "*://*.google.co.jp/maps*",
    "*://*.google.com.br/maps*",
    "*://*.google.com.mx/maps*",
    "*://*.google.nl/maps*",
    "*://*.google.pl/maps*",
    "*://*.google.se/maps*",
    "*://*.google.ru/maps*",
    "*://*.google.com.ar/maps*",
    "*://*.google.com.tr/maps*"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "assets/icon48.svg"
    }
  },
  "icons": {
    "48": "assets/icon48.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "maps-leads-scraper@example.com",
      "strict_min_version": "109.0"
    }
  }
}