You can do a check for corrupted and duplicate fonts and other font issues: *http://www.thexlab.com/faqs/multipleappsquit.html - Font Book 2.0 Help: Checking for damaged fonts *http://www.creativetechs.com/iq/garbled_fonts_troubleshooting_guide.html ---- See: *https://support.mozilla.org/kb/Firefox+crashes+when+you+open+it *https://developer.mozilla.org/en/How_to_get_a_stacktrace_for_a_bug_report *http://kb.mozillazine.org/Mozilla_Crash_Reporter#Location_of_crash_reports *http://kb.mozillazine.org/Mozilla_Crash_Reporter#Viewing_crash_reports

To date problem seems solved, although it was achieved by downloading the latest version rather than following any of these steps