How to clear the Firefox cache

Colleen Porter

The Firefox cache temporarily stores images, scripts, and other parts of websites you visit in order to speed up your browsing experience.

Click the menu button and select Preferences.
Select the Privacy & Security panel.
In the Cookies and Site Data section, click Clear Data….
Remove the check mark in front of Cookies and Site Data.
With Cached Web Content check marked, click the Clear button.
Close the about:preferences page. Any changes you've made will automatically be saved.