Browser Face-Off: Battery Life Explored 2014
 

It has been five years since we did a benchmark of web browsers effect on battery life and a lot has changed. Back then, our testing included Opera 9 & 10, Chrome 2, Firefox 3.5.2, Safari 4, and IE8. Just looking at those version numbers is nostalgic. Not only have the browsers gone through many revisions since then, but computer hardware and the Windows operating system are very different as well.

http://www.anandtech.com/show/8327/b...-explored-2014