Now, Firefox 69 also blocks web-based cryptocurrency miners by default,
Nice.Anyway, Firefox has always been a privacy advocate for as much as I remember. It looks like they're catching up towards the Brave browser in terms of privacy.
Chrome is pretty much spyware at this point. Firefox is superior by pretty much every metric.
Unfortunately, Chrome has sort of been the "standard" browser to use for a while now as people have been very used to it's UI/UX already, and because it was the sort of "faster" browser back in the day. The typical person simply just doesn't give a crap about privacy unfortunately.