Fiddler is a free HTTP debugging proxy. It is a Win32 app that allows you to view and edit HTTP requests and responses.

• If the machine that you're running Fiddler on is shutdown without first shutting down Fiddler, it's possible some issues will come up. Things like Outlook, TFS Team Explorer and other applications fail to function. To correct this, simply open and close Fiddler.

• With some configuration, Fiddler allows you view SSL requests.

• FireBug is another option, but Fiddler is browser independent.