* [http://support.mozilla.com/en-US/kb/Backing%20up%20your%20information Backing Up Your Profile Information]
* [http://support.mozilla.com/en-US/kb/Recovering%20important%20data%20from%20an%20old%20profile Recovering Your Profile Information]
To restore the default Root Certificate Settings, find the cert8.db file as described in [http://support.mozilla.com/en-US/kb/Backing%20up%20your%20information Backing Up Your Profile Information.]
# Shut down Firefox
# Move the cert8.db file into a different folder/directory.
# Restart Firefox