I also would want a source for that. At least in the mobile dev space, it has always been common practice for them to leverage private APIs to do things regular app devs cant.
> At least in the mobile dev space, it has always been common practice for them to leverage private APIs to do things regular app devs cant.
On mobile (iOS), yes. But power consumption comparisons tend to be on desktop (macOS) because the other browsers can't run on iOS at all. And I don't think Apple can enforce that API privacy on macOS because they unlike iOS they allow apps to be installed from outside the App Store.