In order to clear your cache and cookies, first open Firefox. On the top right of your browser, click the three line drop down icon.
Then from the drop down menu, select the options button.
This will open up an options tab to configure browser settings. From here, click on the Privacy and Security tab.
In the middle of the page on the Privacy and Security window, you will see a Cookies and Site data option with the clear data button under it. Select this button.
Once you have clicked it, a notification window will show up showing that you are about to clear the Cookies and Site data as well as cached web content. Click the clear button to accept this notification.
