Examine source code of Minimal Email Notifier

{
  "manifest_version": 2,
  "name": "Minimal Email Notifier",
  "version": "1.0",
  "description": "Thông báo email mới một cách tối giản.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "alarms",
    "notifications",
    "https://mail.google.com/*"
  ],
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{043badf2-bf31-41c9-83a9-ad1c8eaa3c8c}"
    }
  }
}