The free web debugging proxy for any browser, system or platform.
if you reboot your computer on Windows 10 with fiddler open, then it kills your network connection. One the computer boots up again, you have to reopen fiddler.
This is, alas, a bug in Windows with no easy fix; see https://connect.microsoft.com/IE/feedback/details/838086/internet-explorer-10-11-wininet-api-drops-proxy-change-events-during-system-shutdown and https://blogs.msdn.microsoft.com/ieinternals/2013/10/11/understanding-web-proxy-configuration/
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