I have discovered anomalous rendering in Firefox which seems to be splitting the visual menu components from theis functional location.
I've made a page http://www.middlepath.com.au/menu_test.php
where you can see the anomaly (at least in Firefox 126.96.36.199)
In IE it looks good in Firefox the Menu buttons appear at the foot of the page while the mouseover activation happen where the buttons should have appeared.
Any guidance to fix this will be greatly appreciated