I believe ungoogled-chromium does have MV2 support. Unfortunately, there are still real security concerns with Firefox. The good news is that Trivalent (a hardened version of Chromium developed by the Secureblue folks) has ad/content blocking built in. I am still mostly using Firefox, but the small amount that I have used Trivalent has been good.
A note to the effect of:
is a good idea if I ever do recommend a Mac.