Domain navigation is an extension that let you navigate through domains (like www.mozilla.org) stored in your browser history. It will add 2 buttons (Domain Back and Domain Forward) to your tool bar, so click with right button on the toolbar and add the buttons. This extension is made to make navigation easy. Let's say that you visited www.gamespot.com, then left to www.google.com and made lots of searches. Now you want to go back to Gamespot, just click the Domain nav Back button and you'll be there. Also, if you want to hit the first page on the next domain (i.e. Google), click Forward. Hope you like it!