I am shocked that Mozilla of all companies would do this. Fortunately, it's easily disabled.
Firefox Now Sends Your Address Bar Keystrokes to Mozilla
https://www.howtogeek.com/760425/firefox-now-sends-your-address-bar-keystrokes-to-mozilla/
@voltronic time to troll them and finally put FF to some useful use.
@voltronic
Et tu, Firefox?