chrome isn't as good with hardware acceleration as Safari. In my particular use case, Chrome's engineers found some challenges with my iGPU (HD3000, MacBook Air 2011) and just axed support for it, completely.

As a result, any 720p60fps video on you've will make my CPU go above 100%. Google maps won't have any 3d feature. Google earth won't work. Any WebGL app won't work.

Of course, Safari has brilliant hardware acceleration. Same tasks, like watching the same youtube video, will consume less than 30% GPU, and battery life will last twice as long and the machine will run cooler.

Firefox has hardware acceleration, but it doesn't work as good and the whole browser has tremendous issues that impact performance, from the interface itself (slow slow) to not supporting multiprocessing (1 bad tab crashes the whole thing) etc.

Even on modern devices, Chrome will tax your battery and CPU a more than Safari, for similar tasks. Of course, it has other advantages so it's up to you. But it was so damn obvious that you were using Chrome.

Complain all you want. At the end of the day, it's Chrome. Other thing: New computers are getting smaller batteries (from all OEMs) and relying more and more on software optimization to achieve their goals. Apps like Chrome have so much overhead (they run everywhere... Just bad, everywhere) that they destroy those goals. On windows you won't see that big of a gap because edge still hasn't nailed what Apple did with Safari, but it will get there.