I use Waterfox which forgets all data on exit, with Privacy Badger and Port Authority extensions with no exclusions.

So far, no sites really "break", if anything, they're a little quicker.. reading mode is nice to get passed paywall popups on most sites that want a subscribe.

If at work, I include the company-provided password manager for all my sites I need. Still works well (unless my post gets attention and companies try to break it)