chromium/chrome/test/data/extensions/api_test/webrequest/ntp_request_interception/extension/manifest.json

{
  "name": "NTP Request Interceptor",
  "version": "1",
  "manifest_version": 2,
  "permissions": ["webRequest", "<all_urls>"],
  "background": {
    "scripts": ["background.js"],
    "persistent": true
  }
 }