On Wed, 14 Sep 2016 16:48:27 -0400, Larry K wrote:

For the life of me, I can't figure out what changed since all I did was
a refresh. Looked through numerous support pages, and uninstalled and
reinstalled it with no positive results. I have disabled the add-ons and
tried to no avail.

Any advice would be appreciated.

Try a "reset".

https://support.mozilla.org/en-US/kb/reset-preferences-fix-problems#

"Reset Firefox preferences to troubleshoot and fix problems" Worked
for me one time.

Or boot in safe mode to see if FF works.