Fiddler

Fiddler is a useful web debugging proxy designed with the ability of logging all HTTP traffic that flows between the internet and your computer.

This useful application allows users to inspect all HTTP traffic, as well as set breakpoints. It is also possible to manipulate outgoing or incoming data. In order to make everything possible it includes an efficient scripting subsystem based on events. What´s more, it may be expanded by using .NET languages. On its interface you´ll find a tab for statistics that displays a detailed summery of all selected objects.

A positive point about Fiddler is that it has been designed to be way simpler than other programs of its kind, that way novel users will not get confused. By using it you will be able to easily debug traffic from any program. For instance we can mention Opera, Internet Explorer, Mozilla Firefox, between others.