chargingTime : Infinity level : 0.77
Yes that is indeed my phone's current battery level. And no matter if incognito Brave, Firefox Focus or Chrome browsers, I am unique to the site.
Even Firefox Focus which is meant to be good for privacy by throwing the entire session each time is leaky as eg with the audio context.
The problem is that shitheads exploit every possibility to reduce the utility of society in favour of their own profit.
This is why we can't have nice things; as the aphorism goes.
Maybe programmers and designers should start thinking the other way around: what could be pretty clever that could be used for a feature but that CANNOT be misused for tracking
That sounds like a client concern, not a server concern.
I mean, as a consumer of web content I do not want my power saving profile to be accessible or actively influenced by a third party.
Having said that, I do get that battery level has some potential as part of a very short-lived fingerprint, and I really don't see the need to expose this information to remote sites.