Intermittent PASS in /html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html

```
  ▶ Unexpected subtest result in /html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html:
  └ PASS [expected FAIL] b"load event does not fire on window.open('about:blank')"
```