I've been rocking Waterfox since the whole MPL/ToS enshittification. Waterfox has kept most of the AI shit out. If I had to guess, those parts require ToS acceptance and since Waterfox can't legally grant usage to Mozilla's servers, they can't be included.

I'd love to see a true FOSS alternative browser hit mainstream and would gladly give LadyBird a try once it's usable.