Chrome is definitely faster and efficient, but we can’t judge browsers just on the basis of being fast. With Quantum Mozilla is trying to catch chrome, boy it’s going to be a close one. Safari and Opera also are brilliant browsers, they have a lot of features too.
What I want to say if you read between the lines you would find out that both chrome and mozilla would take a toll on your system resources. They consume RAM. On the other hand there are browsers that work even when you don’t have such resources. The answer to this question is subjective.
Read the blog to find out more about the browsers, it’s a good read.