I have an old, slow, 2006 laptop. Still works, use it as a media PC. At first, i went from IE -> chrome. It picked up 5 years of life. Recently thought i would have to finally decommision the box.

Installed firefox, runs like i did -5 years ago. Same websites, same tab consumption, more performance, no intermittant hangs, less ram consumption..

TDLR; install firefox if your having memory issues with chrome. all that tracking, google services and integration has a LARGE cost, not just to your privacy!