Generally speaking, I wouldn’t worry about memory usage unless you’re actively experiencing OOMs or issues like that. Linux is very good at making use of available memory for disk caching (as otherwise unused memory is effectively wasted). See https://www.linuxatemyram.com/ and In defence of swap: common misconceptions for more information.
with a couple tabs open. With more tabs, chromium and brave eat ram exponentially. Best for me seems to be, downloading the tgz of floorp and running that