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...
I've got 30 tabs open today, and the oldest of them is only a few hours old.
I look down a page, see interesting links, and middle click them all. They open tabs but don't actually load until I click that tab. I close each tab after I'm done reading it, or after a few hours if I never got around to reading it and lost interest.
Is that hoarding? I don't think so. But it's the sort of workflow that TST makes pleasant but is extremely frustrating with a horizontal tab bar.