Default Firefox settings with uBlock Origin results in everything passing except the unique fingerprint, and hardening Firefox to do that is easy enough with something like Privacy Badger, some fingerprint anonymization extensions or just disabling JavaScript. From my experience, though, doing that will make the web nigh-unusable for the average user with sites regularly breaking or constantly spamming you with Captchas wherever you go.
I’m curious how “usable” Mullvade Browser is for the everyday user, compared to Firefox with uBlock Origin.