"I very recently worked on the Edge team, and one of the reasons we decided to end EdgeHTML was because Google kept making changes to its sites that broke other browsers, and we couldn't keep up." https://news.ycombinator.com/item?id=18697824
although see this comment from the replies: https://news.ycombinator.com/item?id=18701430
First, I can find nowhere that Chrome claimed to have better video-watching battery life (in fact, popular tech sites mention improving but still worse).
Second, the only dip I can find in the public Edge battery life tests was
April 2017 - 12.5 hours
Dec 2017 - 16 hours
May 2018 - 14.3 hours
vs Chrome's 9.3, 13.5, and 12.5 hours. Which means whatever happened last spring, Chrome also dipped."
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