FireFox Add-ons: Live HTTP Headers

Introduction:

With this Add-on, you can monitor HTTP Headers both FireFox send and receive.

DownLoad:

https://addons.mozilla.org/en-US/firefox/addon/3829
https://addons.mozilla.org/en-US/firefox/downloads/file/12448/live_http_headers-0.13.1-fx.xpi

Usage:

Tools --> Live HTTP Headers