The benchmark Mozilla highlights for this release (2x faster) is Speedometer 2.0. FF57 is 2x faster than FF52, which came out roughly 7 months ago.
In my own personal testing (you can run on your machine in a couple minutes), FF57 is 10% faster than FF56 on that benchmark, and Chrome 60 is 10% faster than FF57.
In my own personal testing (you can run on your machine in a couple minutes), FF57 is 10% faster than FF56 on that benchmark, and Chrome 60 is 10% faster than FF57.
https://mozilla.github.io/arewefastyet-speedometer/2.0/