ProtonMail has an official TOR page, there hardly is a reason for those performing activities illegal under relevant jurisdictions (I support the notion of illegal non necessarily being evil - in many countries many good things like fighting corruption, loving a same-sex partner or responsibly using psychoactive substances for genuine medical reasons can be illegal) to use it the way exposing their actual IP address.

I also don't understand why does ProtonMail record the device type - I doubt there is a law requiring this.