chromium/chrome/test/data/extensions/api_test/service_worker/worker_based_background/notification_click/manifest.json

{
  "name": "Extension API in Service Worker notificationclick",
  "description": "Demonstrates usage and features of user gesture",
  "version": "1.0",
  "manifest_version": 2,
  "permissions": ["notifications"],
  "background": {"service_worker": "background.js"}
}