Mozilla Firefox: Clear Cache & Cookies
- At the top of the Firefox window, click on the Firefox button, go over to the History menu and select Clear Recent History….
- Set Time range to clear to Everything.
- Click on the arrow next to Details to expand the list of history items.
- Select Cookies and Cache and also make sure that other items which you may want to keep are not selected.
- Click Clear Now to clear cache and cookies now.