I've got one "Fill xxx" item in my 1P menu that is now the very definition of persistent.
Setting the Display choice to Never Display in Browser, and restarting.
Clearing 1P3 cache. Rebuilding the 1P3 data file. Clearing the Safari cache. Restarting.
Deleting the xxx login item in my vault. Restarting.
None of these get rid of the "Fill xxx" in the Safari 1P menu.
So how do I do it?