| Request headers | |
| PASS basic request header | |
| PASS Simple request headers need not be in allow-headers | |
| PASS Unspecified request headers are disallowed | |
| PASS Strange allowheaders (case insensitive) | |
| PASS INVALID_STATE_ERR on setRequestHeader before open() | |
| PASS INVALID_STATE_ERR on setRequestHeader after send() | |