From what I've read, Safari is more optimized on Mac than Chrome, therefore better battery life for a Macbook Air. However, the site I need use Adobe Flash to display graphs, and so I need to the browser to have Flash enabled. I searced for any comparison between using Chrome (without installing Adobe Flash) to using Safari (with Adobe Flash installed), but couldn't find any, so I tried both myself. Looking at the Activity Monitor, on the Avg Energy Impact column, Chrome actually only scored 4.15 while Safari scored 6.74. I did the test for just 5 minutes each, so this might not be accurate. I would like to know if anyone else have ever tried this test before. I would like to use just Safari, but if using Chrome is more energy efficient (to use Flash), I guess that's the way to go. By the way, I'm using Mavericks.