Edit and replay XHR chrome/firefox etc?

Question

I\'ve been looking for a way to alter a XHR request made in my browser and then replay it again. Say I have a complete POST request done in my browser, and the only thing I want

Answer 1

5 years have passed and this essential requirement didn't get ignored by the Chrome devs.
While they offer no method to edit the data like in Firefox, they offer a full XHR replay.
This allows to debug ajax calls.

"Replay XHR" will repeat the entire transmission.