I've given up shilling anything having to do with Firefox (use Tor if you have/need to) since every fork will suffer from the downstream effect; there's no reason NOT to use Chromium at this point (ungoogled, of course).

Aside from Manifest V3, which you can supersede with a DNS filter, there's more upside to using Blink then Gecko/Quantum in its current. Mozilla is insisting on being something that WONTFIX, so others shouldn't bother trying to; Google never lied about being a champion of privacy, but that doesn't mean you can't make Chromium private.

Ungoogled Chromium on desktops, Vanadium on GrapheneOS, and Cromite on anything else. No exceptions, no lesser forks.