Examine source code of Password Breach Alert

{
  "manifest_version": 3,
  "name": "Password Breach Alert",
  "version": "1.0",
  "description": "Notify users if their saved passwords have been compromised in data breaches.",
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "https://haveibeenpwned.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9e8d6b1-7e9f-4c3d-8b5a-7f9a82dfb8cd}"
    }
  }
}