
In the Time Range to clear: drop-down, select Everything.Click History and select Clear Recent History….Click the menu button to open the menu panel.If you find that Firefox can load some websites but not others, first clear your Firefox cookies and cache: Click the Toggle button to set the preference value to true, if it's not already set.If such preference doesn't already exist, select Boolean and click the Add button.Click Accept the Risk and Continue to go to the about:config page. Type about:config in the address bar and press Enter Return.Ī warning page may appear.This is recommended for advanced users only. Warning: Changing advanced preferences can affect Firefox's stability and security. Any changes you've made will automatically be saved.



For instructions on how to configure some programs, see Configure firewalls so that Firefox can access the Internet. So, you should make sure your Internet security software is up-to-date and remove Firefox from your program's list of trusted or recognized programs, then add it back. Note: Some Internet security programs can block Internet access even when they are disabled.
