Make sure that you do not use Clear Recent History to clear the "Browsing History"

• https://support.mozilla.com/kb/Clear+Recent+History

If you use cleanup software like CCleaner then check the settings for the Firefox application.

I don't use Clear Recent History. Firefox just saves History for today or one day and clears it out at the end of the day. I'd like to save History for at least three days. Haven't been able to figure out how to do it..

Thanks, Bill

See:

• http://kb.mozillazine.org/Resetting_preferences

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.com/kb/Safe+Mode