I've been staying with Firefox not for the performance (today Chrome loads Google sites like YouTube faster), but mainly for Tree Style Tab extension. I couldn't imagine opening more than a dozen of tabs without it.
I can't imagine having more than a dozen tabs open, period. You tab hoarders will never make sense to me...
For games, I often have a bunch of wiki tabs open at the same time.
As for history, imagine you're researching a topic and have gone through fifteen search results, decided three of them were relevant, and closed the others. Your history is polluted with all fifteen, whereas this tab search will directly return you these most relevant pages only.