In some cases it's just the inevitable effect of the OS vendor being the browser vendor. For example, DRM video in Safari is decrypted in dedicated low power h

In some cases it's just the inevitable effect of the OS vendor being the browser vendor. For example, DRM video in Safari is decrypted in dedicated low power hardware as the DRM system is in the T2 or M1 chip, because Apple built FairPlay into the hardware. Chrome uses Google's own Widevine, which isn't implemented in hardware, so all the decryption operations are done in software on a Mac (with a subsequent hit on battery life). On a Chromebook Widevine is done in hardware, so the battery is better (and you get trusted with better resolutions by content providers because it's more secure). And if Apple were willing to port Safari to Chromebook's it would suffer an about turn in performance penalty.