[kakkksaknmdm]

Have a read: https://www.ieee-security.org/TC/SP2019/papers/405.pdf

[pragmatick]

All the links you provided describe techniques that would only work on mobile devices with access to the sensors. On my desktop PC there's no GPS, no gyrometer, no webcam and no browser access to my microphone.

[pushcx]

And no access to that on mobile without security dialogs. Dude originally claimed it worked via CSS. I guess he doesn't have secret superpowers.