Firebug: Inspect Post From Webpage

Can I use Firebug to inspect a post request sent by a webpage to a server and if so how? I am refering inspecting a regular POST made using a form, but would also be interested in

Solution 1:

Of course you can do that. The Net panel allows you to expand every request related to a website. For a POST done via AJAX you can set the XHR filter to see only those requests.

If you expand a request by clicking on it, you'll get all the information related to it.

Sebastian