1 main frame - didStartProvisionalLoadForFrame
2 main frame - didCommitLoadForFrame
3 frame "<!--framePath //<!--frame0-->-->" - didStartProvisionalLoadForFrame
4 main frame - didFinishDocumentLoadForFrame
5 frame "<!--framePath //<!--frame0-->-->" - didFailProvisionalLoadWithError
6 main frame - didHandleOnloadEventsForFrame
7 main frame - didFinishLoadForFrame