I use Firefox with a lot of tabs. I guess I’m a multi-tasker. Or I have surplus attention. Or they fixed enough memory leaks in Firefox 3 so that opening a new tab is almost cost-free. Until you restart your browser (is there a bug open for this? I couldn’t find one).
I’ve just made a quick movie from the unedited sound of Firefox 3 restarting this morning: Krafty Nacirema (multitasking mix).