The BatteryBox folks did some tests and posted the results: http://blog.getbatterybox.com/which-browser-is-the-most-energy-efficient-chrome-vs-safari-vs-firefo

The BatteryBox folks did some tests and posted the results: http://blog.getbatterybox.com/which-browser-is-the-most-energy-efficient-chrome-vs-safari-vs-firefox/ http://blog.getbatterybox.com/which-browser-is-the-most-ener... >> TL;DR; If you’re a MacBook user, you’re losing an average of 1 hour of total battery life by using Chrome. Firefox is a little better, but Safari is the clear winner. You’ll want to use Safari if you want to get the most battery out of your laptop.