Need Firefox plug-in to show POSTed variables

Question

I need to find out what variables and values are being POSTed to a script that I'm debugging. It's doing something strange to them, and it needs to start a session so I can't ouput them right at the beginning. I'm hoping to find a plug-in for Firefox that will show me what they are directly from the browser. Does anyone know of such a thing?

Answer 1

Firebug does that perfectly :)

1. install Firebug
2. open the network tab

Answer 2

Use Firebug. It's awesome.

The Net panel shows you what's going on over HTTP.

Answer 3

Fiddler has such a plugin and it is also just a good HTTP debugger in general

Answer 4

LiveHTTPHeaders is an oldie but a goodie

Answer 5

Live HTTP Headers

Let's you see every request, edit it and replay it. Excelent plugin and easy to use...