Examine source code of WhatsApp Bulk Sender — Free WA Auto Sender

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "WhatsApp Bulk Sender — Free WA Auto Sender",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqFUdJ/ZoB7EEiVC2PXZUWtxBpIg199bw6YTnVsW1B+VqvJKD9nXOHU8nCiVFHmgdOuc9zDL10A/6SUWtsdLP8Csy17v3bFVtLvwuYAL7dG4J2maoAov1mVyk+FT1lDiakGkqDxP4acajd2/nQ4JQWRI+ntGbWY+yJpH7VaYs+MhQcssbPbpoq6FwWCjU6X/Uu7Np8jg1nSXvlLb6DPuyI03aqAT8ToFSepQKr7GkfAm9slmeKWuEmsy+Z2HojxfBQTYCdM1yw+itJqpvVHogcGTYQLR6MD2VsaKuFoug25boR+KMe6rV+5Z8wBkbAZ2LSikbbDZui2FwqpbCSA3RfwIDAQAB",
  "version": "1.3.2",
  "description": "Free WhatsApp bulk sender with human-like typing & smart delays. Send bulk messages without API or saving contacts.",
  "permissions": [
    "storage",
    "tabs",
    "alarms",
    "identity",
    "activeTab"
  ],
  "host_permissions": [
    "https://web.whatsapp.com/*",
    "https://www.googleapis.com/oauth2/v1/userinfo",
    "https://us-central1-bulk-sender-wa.cloudfunctions.net/*",
    "https://accounts.google.com/o/oauth2/v2/auth"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; style-src 'self'; font-src 'self'; connect-src 'self' https://docs.google.com https://api.qrserver.com https://identitytoolkit.googleapis.com https://securetoken.googleapis.com https://*.cloudfunctions.net https://www.googleapis.com https://oauth2.googleapis.com https://accounts.google.com"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "WhatsApp Bulk Sender — Free WA Auto Sender"
  },
  "background": {
    "service_worker": "background/service-worker.js"
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*"
      ],
      "js": [
        "content/content-script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "wa-outreach-pro@mohamedlimami.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}