Firefox uses my system defined default fonts (DejaVu Sans, DejaVu Serif, Hack) where Chrome completely ignores the system fonts.
IMO using the system defaults is the correct action here.
Anyway after manually configuring Chrome to use the system defaults they look identical to me:
Firefox: https://i.imgur.com/Zplpyiq.png
Chrome: https://i.imgur.com/YWkeZjh.png
So no, font rendering on FF seems fine to me...
Maybe I'm getting old and my eyes aren't seeing the differences but they look the same to me.