Microsoft says that it's optimized the browser's UI for power efficiency, right down to the little things like animations.
What is interesting is that the Edge browser from Microsoft managed to last a total of over three hours longer than Google's Chrome browser. The company tested Mozilla Firefox, Opera and Google Chrome and their own browser Microsoft Edge.
Microsoft execs also blogged about the processes and the lab set-up the company used to test the battery life of Windows machines running various browsers. First, we measured their power consumption in a controlled lab environment. Microsoft is also promising even more power-saving enhancements with the Anniversary Update to Edge, thanks to fewer CPU cycles, less memory consumption, and controls on background activity and Flash ads. That was 70 percent longer than Chrome, 43 percent longer than Firefox, and 17 percent longer than Opera in Microsoft's tests.
To cement further its case, Microsoft has released aggregated telemetry data from millions of Windows 10 computers that reveal both Microsoft Edge and Firefox are more efficient than Chrome. We use this telemetry to ensure new features and code changes don't increase our power consumption, and to validate new features created to improve energy efficiency. Finally, we recorded time-lapse videos of each browser performing the same tasks until the battery dies.
As we said in our browser round-up, Chrome won because it's stable; it has a healthy extension and app ecosystem; its interface is not complex; and it integrates nicely with other Google services, from Gmail to synced open tabs that you can access across your devices.