Examine source code of RotaCheck Export

{
  "manifest_version": 3,
  "name": "RotaCheck Export",
  "version": "1.7",
  "browser_specific_settings": {
    "gecko": {
      "id": "rotacheckexport@appmania.com.br",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://envios.adminml.com/*",
    "https://rotacheck.appmania.com.br/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://envios.adminml.com/*",
        "https://rotacheck.appmania.com.br/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html"
  }
}