
PASS accessing a ServiceWorkerRegistration from a removed iframe 
PASS accessing a ServiceWorker object from a removed iframe 
PASS accessing navigator.serviceWorker on a detached iframe 
FAIL accessing navigator on a removed frame assert_throws: function "() => get_navigator()" did not throw
FAIL accessing navigator.serviceWorker on a removed about:blank frame assert_equals: expected null but got object "[object ServiceWorkerContainer]"