I think most of my feelings have been covered already by other people, but just to reiterate: this is an incredibly stupid and harmful idea. Drop it, or I'm leaving Firefox - and I'm far from alone in saying that.
Frankly, I'm not sure I can believe you. There's money to be made in the AI trend despite it being wildly unethical and out of step with Mozilla's supposed values, so you've decided to force it onto all of your users. I suspect you don't want it to b...