I think I'm late to this but I'd suggest you to stick with firefox and customise it. See privacytools.io for customisations.
Use it with addons like uBlockOrigin, NoScript.... Follow /r/privacytoolsio and /r/privacy on reddit.
Projects like Pale Moon and Waterfox are nothing but FF with some customisations, you can do it manually. Those projects are not updated regurarly, Pale Moon is dead (I think), IceCat was recently updated.
Overall you will get updates slowly, that can be dangerous. About Brave, it is just another chromium fork with its own telemetry and sh*t included. Stay away!
FF is the best because you can do whatever you want!