SunSpider is a JavaScript benchmark, probably one of the oldest ones around. We ran version 1.0.2, the latest and last version released (Sunspider is no longer maintained).

For this benchmark, a lower number is better.

Chrome started off OK:

Firefox did worse:

Edge destroyed them both, finishing in less than half the time:

This is an old test, but the reason I keep running it is because I find it interesting that all three browsers bring in consistently worse results as time goes on. The placement has stayed the same lately though: Edge wins by a wide margin, followed by Firefox, and then Chrome.