Microsoft Edge browser
What happens when three identical devices run on different browsers? The Microsoft Edge team wanted to find out. This experiment showed that battery life on a PC running Microsoft Edge lasts 70% longer than Chrome, 43% longer than Firefox Firefox, and 17% longer than Opera (with Battery Saver enabled).
Microsoft Edge lasted three hours longer than Google Chrome.
Average power consumption in milliwatts for identical workloads in Microsoft Edge, Google Chrome, Mozilla Firefox, and Opera (with battery saver mode enabled). Unless specified, all browser settings were left at their defaults.
To find out detailed info, please visit Microsoft official Windows Blog