--- a/firefox-devel.rst	Tue Nov 09 21:45:42 2010 +0200
+++ b/firefox-devel.rst	Wed Nov 10 00:00:24 2010 +0200
@@ -28,6 +28,25 @@
   https://addons.mozilla.org/firefox/addon/1843
                 download page
 
+** Live HTTP Headers.
+
+ * First by adding a 'Headers' tab in 'View Page Info' of a web page.
+ * Second by adding a tool in the 'Tools->Web Development' menu to be able to display http
+   headers in real time (while pages are being downloaded from the Internet.
+ * Third by letting you edit request headers and replay an URL (beta). Look for the Replay
+   button in the live window!
+
+This project may be of some help for the following:
+
+    * Help debugging web application.
+    * See which kind of web server the remote site is using.
+    * See the cookies sent by remote site.
+
+  http://livehttpheaders.mozdev.org/
+                home page
+  https://addons.mozilla.org/en-US/firefox/addon/3829/
+                download page
+
 * How build Firefox.
 
   https://developer.mozilla.org/en/Build_Documentation