Simple requests

Simple requests shouldn't trigger preflight


FAIL No preflight GET and {"save-data":"on","device-memory":"2.0","dpr":"3.0","width":"1200","viewport-width":"1300"}  A network error occurred.
FAIL No preflight HEAD and {"save-data":"on","device-memory":"2.0","dpr":"3.0","width":"1200","viewport-width":"1300"}  A network error occurred.
FAIL No preflight POST and {"save-data":"on","device-memory":"2.0","dpr":"3.0","width":"1200","viewport-width":"1300"}  A network error occurred.