Regardless, I don't want baked-in Firefox adblocking in part because I don't trust Mozilla with that task either. They'd absolutely end up allowing their own "acceptable" telemetry and ads. Even if they didn't, it would be unlikely to ever be as effective as Ublock Origin. Much like how Chromium browsers' built-in adblocking is barely anything in comparison, even on Manifest V2.
And yet, for now, Firefox and Mozilla is by far the lesser evil. I like a few of the Chromium browsers well enough, but they are ultimately at the mercy of Google.
I hope Ladybird does well, too.