I'm just happy the update is not "We've integrated new AI features".
Even Microsoft Recall could be useful for many people, but it should have been opt-in from the start. Personally I'd also wish that AI modules were only installed when you opt in, so you don't take up valuable space (especially on mobile) with a massive matrix of model weights unless the user actually asks for that.
Nobody forces you to use it, and I have much higher trust in Mozilla to not do a sneaky switcheroo to a cloud-based model or something similar than I have in the other browser vendors.