After restarting youll have all your configuration files under the configbackup folder so if you experience any loss of information you can manually restore it by deleting the newly created config file for example HOMEmozilla and moving the old mozilla folder to HOME by doing mv HOMEconfigbackupmozilla HOME

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After restarting you'll have all your configuration files under the config-backup folder, so if you experience any loss of information, you can manually restore it by deleting the newly created config file, for example $HOME/.mozilla and moving the old .mozilla folder to $HOME by doing mv $HOME/config-backup/.mozilla $HOME/