Additional Profile folder created in the 'Users' folder causing issues
At first, I thought this was another instance of FF opening up due to the default GUI that opened until I figured out what was happening.
There is a problem with this other 'Profile' folder being created, buried in the 'Users" folder running Win7. It is not a duplicate of the customized folder within the actual program folder, but just a 'default' profile folder that doesn't get updated when the regular profile changes (add ons, etc).
There are 3 folders (only one seems to have data in it) buried in that annoying 'Users' folder in Windows (W7 specifically).