main frame - didFinishDocumentLoadForFrame
main frame - didHandleOnloadEventsForFrame
main frame - didFinishLoadForFrame
http://127.0.0.1:8000/contentextensions/main-resource.html - didFinishLoading
main frame - didStartProvisionalLoadForFrame
CONSOLE MESSAGE: Content blocker prevented frame displaying http://127.0.0.1:8000/contentextensions/resources/should-not-load.html from loading a resource from http://127.0.0.1:8000/contentextensions/resources/should-not-load.html
main frame - didFailProvisionalLoadWithError
main frame - (kWKErrorCodeFrameLoadBlockedByContentBlocker)