Fiddler vs Firefox w/ Firebug
Fiddler does look interesting and I've seen people recommending it as a good debugging tool but a quick runthrough I don't see anything all that great that we dont already have in Firebug. What can Fiddler do that Firebug cannot? Conversly what can Firebug do that Fiddler cannot? Yes it can - it is capable of showing HTTP messages from any program, not only web browsers. Fiddler is an extensible web-debugging platform which can be extended with any .NET language. It allows you to write pluggable inspectors to display traffic in a context-sensitive manner, and allows tampering with any request