It’s very easy to make a video guide for your task with a Addon of FireFox. It’s called Capture Fox
You can use this tool to capture firefox window or the whole screen and make screencast videos. You can compose tutorials, e-lessons or videos. You can also record your voice.

This extension is for Windows XP and Vista.

Please send us your feature requests that will enhance the usability of the application.

Enjoy! :)

Download & auto install: https://addons.mozilla.org/en-US/firefox/addon/8090

Homepage: http://www.advancity.net/eng/products/capturefox.html

Support: http://groups.google.com/group/capturefox or This e-mail address is being protected from spambots. You need JavaScript enabled to view it