Ngl, I've never had issues with either for ram. my experience with Firefox is mostly the sameas chrome with ram usage. The main reason Im on Firefox is cause it's been a whole lot more stable for me than chrome.
Do you sometimes lose your patience when dealing with a co worker or friend who is barely capable of using a computer or smart phone?
maybe the creality filaments are moist? Do you hear popping noises? if so then try drying em in a dehydrator.
Often use it when it's single player and my frames aren't enough to feel smooth.