Examine source code of Important Email Response

{
  "manifest_version": 2,
  "name": "Important Email Response Notifier",
  "version": "1.0",
  "description": "This extension tracks important emails and notifies the user when a response is received, helping them manage important communications easily.",
  "permissions": [
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{95bfc552-45fa-4e8e-ae0c-b42b6f8caecf}"
    }
  }
}