如何在Firebug中编辑POST参数？

I am using Firebug on Firefox for Mac in order to see the info about the request data sent to the server and what response is taken from the server. I have a problem with my Spring+Hibernate+JSF+MySQL application; i.e. I cannot persist new objects to the database. In Eclipse, I have an XHTML file as follows:I am using Firebug on Firefox for Mac in order