Verify navigator.sendBeacon() mixed content checking. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". FAIL navigator.sendBeacon("http://example.test:8000/blink/sendbeacon/resources/save-beacon.php?name=cross-origin", "CrossOrigin"); should be false. Was true. PASS successfullyParsed is true Some tests failed. TEST COMPLETE