chromium/chrome/test/data/extensions/api_test/service_worker/registration/ntp_extension/extension_version_2/manifest.json

{
  "name": "Version 2 extension",
  "version": "2",
  "manifest_version": 3,
  "background": {
    "service_worker": "background.js"
  },
  "chrome_url_overrides" : {
    "newtab": "ntp.html"
  },
  "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8c4fBSPZ6utYoZ8NiWF/DSaimBhihjwgOsskyleFGaurhi3TDClTVSGPxNkgCzrz0wACML7M4aNjpd05qupdbR2d294jkDuI7caxEGUucpP7GJRRHnm8Sx+y0ury28n8jbN0PnInKKWcxpIXXmNQyC19HBuO3QIeUq9Dqc+7YFQIDAQAB"
}