In addition to completely disabling AI, I found the following setting extremely convinent to disable in about:config. They clutter up my right-click on a link or on text selection.

  browser.translations.select.enable
  dom.text_fragments.enabled
  privacy.query_stripping.strip_on_share.enabled
  devtools.accessibility.enabled

Now if only I could get rid of "Print selection" and "Services" when right-clicking, too (on MacOS)