Looking for a specific FireFox extension / program for Form posting [closed]

Question

I am looking for either a FireFox extension, or a similar program, that allows you to craft GET and POST requests. The user would put in a form action, and as many form key/value pairs as desired. It would also send any cookie information (or send the current cookies from any domain the user chooses.) The Web Developer add-on is almost what I'm looking for; It let's you quickly see the form keys, but it doesn't let you change them or add new ones (which leads to a lot of painful JavaScript in the address bar...)

Answer 1

If you're a windows user, use Fiddler. It is invaluable for looking at the raw Http requests and responses. It also has the ability to create requests with the request builder and it has an auto responder also, so you can intercept requests. It even lets you inspect HTTPS traffic and it has a built in event scripting engine, where you can create your own rules.