"used a previous /home partition"
The User id on your old /home/rejean directory will not match your new user id on your new setup, machines think in numbers rather than names.
Fix is easy:
konsole > su root :
#chown -R rejean:rejean /home/rejean
That will switch user and group permissions to the real user id of user rejean.
Firefox issue, not sure, see if the above fixes it.