I like the messaging I see from Vivaldi’s ceo, and it looks like it has a nice feature set, but they still keep some parts of its code closed source, so I don’t choose it for myself.

Helium is a Chromium based browser that will still support ad blockers, whose devs (unlile the CEO of Brave) seem like good peeps - https://helium.computer/

Besides Librewolf, Waterfox is also a good Firefox/Gecko basd option - https://waterfox.com/