Remaining time

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Remaining time",
  "description": "count down your life time",
  "version": "1.0",
  "manifest_version": 2,
  "icons": {
    "128": "./assets/favicon/sand-clock.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  }
}