

I recommend Fennec by F-Droid, a FOSS fork of Firefox out of the options listed. I would adjust the settings within the GUI, such as setting tracking protection to Strict, and install uBlock Origin.
IronFox is, sadly, somewhat extreme and not suitable for non-tech-savvy users and those who don’t want to deal with regular breakage.
Vanadium sadly lacks a proper content blocker integration.
From the linked GitHub webpage:
I wouldn’t recommend browsers developed by a single person and in an experimental state-part of the reason why I don’t recommend Cromite.
The original Vanadium is great, but the lack of proper content-blocker integration is a big privacy trade-off, in my opinion. Vanadium only provides a per-domain blocker solution, which is based on the very small set of EasyList.
A good Chromium-based alternative would be Brave, as it has a good content blocker that attempts to recreate the full feature set of uBlock Origin.