Even though you pc is connected to Ethernet and switch off. I don’t see possible way to list down the web pages during off mode of desktop or laptop or workstation. We end user try to ping end user use to get designation tcpip address host not found or some negative reply.
So as result switch off computer or desktop which is connected to Ethernet there is not any possible to get the list of web pages access during that time. Packets are transmitted based on mac address.