Geolocation sharing can be disabled as reflected in your source. Everything else you linked to is trivial, but notwithstanding, it all relies on JS which, as I already said, can be disabled. Oh, and many aren't even available in Firefox: https://developer.mozilla.org/en-US/docs/Web/API/Battery_Sta...
> What information do you think apps have without your permissions that websites don’t?
Your actual personal information. Access to photos, messages, metadata (name, address, contacts, notes, metadata, habits).
> What information do you think apps have without your permissions that websites don’t?
Your actual personal information. Access to photos, messages, metadata (name, address, contacts, notes, metadata, habits).