This CSS Code is the only thing that worked for me to move my tabs back to the bottom:https://www.codehaven.co.uk/firefox/firefox-113-2023-tabs-on-top-bottom-not-working-fixed-again/
I truly can't understand why this is NOT an option, after all the gnashing of teeth over many years. I'm so fed up with Firefox that I'm actually beginning to consider Edge (now THAT's bad). I put off upgrading FF as long as I can, and then... some p...