This is an interesting take, since it's so difference from my experience. There's definitely some difference in use cases that had a large impact - whether that's device memory, open tabs, or even choice of websites.

I didn't switch to Chrome when it first came out, but over the next couple of years I found Firefox frustratingly slow and crash-prone. When I cut over, everything was drastically faster and more reliable, plus the feature set (extensions, url completion, incognito for parallel sign-ins, and so on) was noticeably better. High memory usage was the only price, and Chrome surrenders that somewhat gracefully when it's needed.

I'm hoping to make the switch back. Chrome has become more frustrating as Google adds brand alignment, and moreover I simply don't like being siloed by a brand. But the usability gain was massive when I first switched, and I'm only making the move now because there's been a lot of good news out of Mozilla.