Examine source code of Alarme Automatico

{
  "manifest_version": 3,
  "name": "Alarme Maroto",
  "version": "1.1",
  "description": "Toca um som a cada X minutos. Já começa no 30!",
  "permissions": [
    "alarms",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b582136e-2144-486d-97d8-392911365329}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Configurar Alarme",
    "default_icon": {
      "48": "icon-48.png"
    }
  }
}