For the record a quick web search for how to disable AI in firefox gave me this list of items to set to false in about:config :

browser.ml.enable
browser.ml.chat.enabled
browser.ml.chat.sidebar
browser.ml.chat.shortcuts
browser.ml.chat.page.footerBadge
browser.ml.chat.page.menuBadge
browser.ml.linkPreview.enabled
browser.tabs.groups.smart.enabled
extensions.ml.enabled

The brain cells presumably have a life span… if this technology ever gets used in consumer devices, I’d like to know how people will try and squeeze extra life out of a failing component.
Take it out and warm it in their hands like an alkaline battery?
Give it a shake?
Sing to it?
Some kind of stimulant drug?