So to summarize state of Firefox AI garbage group policies:

* ESR (140): Preferences whack-a-mole with browser.ml. flags only.
* Current (149): GenerativeAI policy group should deal with the worst bits, but keeping some Preferences browser.ml. bits around may be needed.
* Upcoming (who knows when, hopefully 150-ish): new AIControls policy group looks like it will deal with more outright badness.

Locking extensions.ml.enabled to false is probably still wise.