How to edit parameters sent through a form on the Firebug console?
Solution 1:
There is no such option in Firebug, but the Firefox built-in DevTools allow you to edit the data of a previous request and send it again.
To get there, first select the Network panel, then in there a request. When you click on the Edit and Resend button, you'll be able to edit everything, the request method, the URL, the query string, the headers and the body.
After a click on Send the request is sent to the server.