What I am asking for above was precisely what you suggest, a way to prevent the browser from making those APIs available for significant tracking purposes. Init

What I am asking for above was precisely what you suggest, a way to prevent the browser from making those APIs available for significant tracking purposes. Initially this might be "hey do you want to share your finger motions / accelerometer with this app" and I'd be OK with a number of pop-ups on first app open, but I'm a customer, not an app developer so I don't really care about the impact on adoption - I care about the privacy.