In the recent times, Microsoft carried out a test to prove that Edge browser is better at consuming less battery than it adversaries Chrome and Firefox.
The test was conducted on a Surface laptop in which the Edge browser lasted for 16 hours, while Chrome browser lasted for 13 hours and Firefox browser lasted for only 9 hours. The difference between Edge and Chrome at that time was almost 3 hours.
Google silently worked to decrease the consumption of the battery for its browser. In the latest test conducted on May 10, the difference between the browsers was almost 2 hours.
As for the Mozilla browser, it is very far from the Edge browser, consuming more power than the other two browsers. Battery only lasted for 9 hours.