What do i need to install ?
You probably know Firefox already, if you dont go get it. Its the browers you need to start recording your testscripts in Selenium.
Selenium IDE is a simple record-and-playback add-on for Firefox. It record your interactions on a website and let’s you playback them with ease.
Very handy if you want to quickly create testscripts and very helpfull in case of exploratory testing or to build a good regression testset.
Firebug is a good tool for to inspect your HTML
Firepath is a addon for firebug, it let’s you even find locaters more easely.
Firefox portable – A handy version of Firefox which can be run from a usb-drive.