Examine source code of Facturacol Sync Helper

{
  "manifest_version": 3,
  "name": "Facturacol Sync Helper",
  "version": "1.3",
  "description": "Ayuda a sincronizar facturas desde el catálogo de la DIAN sin bloqueos de WAF o CORS.",
  "permissions": [
    "cookies",
    "declarativeNetRequest",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "https://catalogo-vpfe.dian.gov.co/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sync-helper@facturacol.fidelgutierrez.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://facturacol-frontend.web.app/*",
        "http://localhost/*",
        "http://facturacolweb.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ]
}