Please explain the problem in detail. What happens? What is/are the exact error message(s) ? [https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings Refreshing Firefox] {web link} is a '''LAST RESORT ! !''' Refreshing Firefox -- easily fix most problems If you're having problems with Firefox, refreshing it can help. The refresh feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks and open tabs. Everything else, like user settings and add-ons, are removed. '''Note:''' Refresh saves your old profile to the desktop in a folder called '''Old Firefox.'''