Clear Browser Cache, History, Etc.
Click the 3 lines at the top, right of the Mozilla Firefox browser to bring up the browser menu.
Click the 'Options' icon and you will then see this screen:
Click 'Privacy' on the left side of the screen and then select your history preference. I always select 'Never remember history' (if you select this option, Firefox may need to restart. This is OK).
Now click the 'clear all current history' link. You will see a dialog window appear.
Select your preferences and click the 'Clear Now' button at the bottom of the dialog window.
Good job. You have now cleared the desired data from Mozilla Firefox.
The next page will demonstrate how to do this for Microsoft Internet Explorer...