Examine source code of NexLotto Importador

{
  "manifest_version": 3,
  "name": "NexLotto Importador",
  "description": "Importa jogos da Lotofácil, Mega-Sena e Loteca para o volante visível das Loterias Online CAIXA.",
  "version": "2.0.2",
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "windows"
  ],
  "host_permissions": [
    "https://nexlotto.com.br/*",
    "https://www.loteriasonline.caixa.gov.br/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self';"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.loteriasonline.caixa.gov.br/silce-web/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_title": "NexLotto Importador",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "nexlotto-firefox@nexlotto.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}