0 Steps to fix Firefox browser: Start your computer again.Clear your cache and cookies.To access the menu panel, click the menu Button Select Clear Recent History from the History menu.Select Everything from the Time Range to Clear drop-down menu.Select both Cookies and Cache from the drop-down menu below. Make sure that none of the other items you want to keep are chosen. Click the OK button.In Troubleshoot Mode, restart Firefox.Reinstall Firefox if necessary.Restart Firefox.Make a new profile in Firefox. Read More : How can I reset my Firefox successfully? Add comment