Firefox has been improving drastically in terms of performance with every release. It's pretty evident in recent months, which is very heartwarming to be honest.
I, however, do to some bad circumstances, have been stuck with a not-so-good laptop (8 GB RAM, a 6th gen processor in AMD A8 7410) and Firefox doesn't run that well on it. This is something that I've observed with Firefox- if you have a decent machine then it will run amazingly fast. However, on lower-end machines, performance can be a struggle AT TIMES.
Any tips on making this browser run at it's best potential on a weak system are appreciated!
Thinkpad x200s (2009) with Core2Duo SL9400, 2gb RAM, 128gb SSD + AntiX Linux with herbsluftwm.
Firefox will not perform smooth here, but very usable. I watch youtube video from Yewtube on Terminal + mpv, browsing only on Lemmy, news on Newsboat RSS feed, Palemoon if some news sources are heavy, and download with wget.
IMO if you experiencing problem on Firefox with that spec, I think there's a problem with your Operation System or your OS is very hungry power. I recommended using Q4OS linux with pure profile installation for minimalist system out of the box in KDE environment. The performance are very good on my Thinkpad x260..