Firefox version 41 update disabled Norton Toolbar

The Firefox update to version 41 disabled the Norton Toolbar indicating it was incompatible with Firefox version 41. The installer indicated Firefox would enable the toolbar when the problem is solved. At first it appears to be a Firefox issue but then they are indicating it is a Norton issue. Anyone know who owns the problem? Also anyone know how to back out the last update of Firefox? All info on the web seems to indicate you cannot roll back to a previous version. I do not know what was so important in the last update that they released the update knowing that it would disable the Norton Toolbar. Bad news is that Firefox is the Browser that has the least number of problems after upgrading to Windows 10. Attempting to find an easier roll back and/or fix before using restore point. Also waiting for a reply from Mozilla.