Mouse over view, How do I reenable?

I disabled the mouse over in Firefox 3.0.1 running Vista. Now I cannot remember how to get to the control panel I used to do it. It has been awhile, but I believe It was in Firefox itself that I did it. Could someone please point me in the right direction? I think I remember what to do, when I get there. Just need a road map to get to it. Thanks

Never mind I figured it out. type about:config in the addy bar. I just so damn use to having a button for everything. Thanks anyway.