Test for cookie blocking when web workers import cross-site scripts. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS Did receive firstPartyCookie == value PASS Did not receive cookie named firstPartyCookie PASS successfullyParsed is true TEST COMPLETE -------- Frame: '' -------- Should receive first-party cookie. Received cookie named 'firstPartyCookie'. Client-side document.cookie: firstPartyCookie=value