the clarification is in a blog post, that may not be legally binding. so in my eyes any clarification outside of the ToS is worthless.
If #Mozilla wants to offer AI services or collect and use their users data, this should be a separate opt-in ToS in my opinion, not the terms of the base application.
But TBH #Mozilla is doing too much dumb management decisions these days, so I'm considering to stop recommending it. (colorways, firing #rust and #servo teams, ads for temu and so on)