When talking about browsers, I think the most famous web browser is Windows's IE series. Microsoft seems very satisfied with the latest IE 10 browser, and always boast of its advantages in various aspects. Now Microsoft has advertised that Internet Explorer 10 is the most energy-efficient browser, and data is provided by freahov's Sustainable Energy Center.
This test mainly compares IE10, Firefox, and Chrome browsers with high market share. Microsoft said that Internet Explorer 10 is more than 18% more energy-saving than Internet Explorer 10. Therefore, if Internet Explorer 10 is used by all Americans, the extra power is available to 10 thousand families. To be fair, this test covers desktops and laptops and calculates the average value respectively.
In the most common web browsing, IE10 is not significantly different from Firefox and Chrome. However, in the subsequent Flash video and Html5 video playback tests, IE 10 performed very well, with an average power savings of 6 Watts over Chrome and 3 Watts less than Firefox.
Of course, this test was completed on the Windows 8 platform. Since IE 10 is its built-in browser, it makes sense to optimize it. If you test the power consumption performance of Safari, Firefox, and Chrome on Mac OS, I believe the results are similar.