stronglikedan parent
I use Firefox and Chrome to separate work from personal, and I can tell you that I have to close and restart Firefox at least once a day due to spinning fans and crawling performance, whereas with Chrome it's about once a week.
For another anecdotal experience, I use both in the same way and never have to restart neither of them until they ask to restart because of updates. Chrome asks much more often.
Since we're sharing our respective anecdotes your experience, interestingly mirrors mine in that I do the same thing for work. Microsoft Edge for work tasks (not my choice but the IT team remotely manages the bookmarks on that one), Firefox for personal. But no issues with speed or needing to shut things down just on an ordinary Lenovo laptop.