main frame - DidStartNavigation main frame - ReadyToCommitNavigation main frame - didCommitLoadForFrame main frame - didFinishDocumentLoadForFrame frame "f1" - BeginNavigation request to 'http://localhost:54321/', http method GET frame "f1" - DidStartNavigation main frame - didHandleOnloadEventsForFrame frame "f1" - didFailProvisionalLoadWithError frame "f1" - DidStartNavigation frame "f1" - ReadyToCommitNavigation frame "f1" - didCommitLoadForFrame frame "f1" - didFinishDocumentLoadForFrame frame "f1" - didHandleOnloadEventsForFrame frame "f1" - didFinishLoadForFrame main frame - didFinishLoadForFrame This is a test of load callbacks. It is only useful inside the regression test tool. It also assumes there is no web server running locally on port 54321.