Help me decide: Which is better, Chrome or Firefox?

Ive used several browers over the years and Chrome just eats up your RAM, it's not the best browser if you like multitasking/or running another apps in the background. Your tabs can get laggy when you do that. 

Firefox loads webpages faster and also is the safest one from what I hear.  I also like their new UI but havent bothered to transfer my chrome data yet. 

Opera is meh. 

Edge isnt very responsive.