New Tab Page with Countdown

Go home count down in new tab page

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manifest.json

{
  "name": "New Tab Page with Countdown",
  "description": "Go home count down in new tab page",
  "version": "1.2",
  "incognito": "split",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissons": [
    "notifications"
  ],
  "manifest_version": 3,
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}