The ethical way of doing this is opt in. It could be done like Debian's Popularity Contest[0], where you're offered a chance to install the data collection soft

The ethical way of doing this is opt in. It could be done like Debian's Popularity Contest[0], where you're offered a chance to install the data collection software, with the default being don't install. Firefox could do this with an extension. [0] https://popcon.debian.org/ https://popcon.debian.org/