| Request headers | |
| FAIL Client hint headers are simple headers A network error occurred. | |
| PASS Unspecified request headers are disallowed | |
| PASS Unextractable device-memory client hint header is disallowed | |
| PASS Unextractable DPR client hint header is disallowed | |
| PASS Unextractable width client hint header is disallowed | |
| PASS Unextractable viewport-width client hint header is disallowed | |