To clear your cookies and web cache, navigate to the Settings menu in your web browser. If you're using Firefox or Chrome, the Settings menu can be found by clicking the 3 stacked lines (Firefox) or dots (Chrome) in the top-right corner.

Cache and cookie options are located in the Privacy and Security settings and will have an option to delete or clear the stored data. After clearing the browsing data for a website, you'll need to log into it again.

Firefox

Chrome

In Chrome, the option to delete browsing data is in the browser menu or a shortcut of Ctrl+Shift+Del can be used. To choose options of which history, cookies, and cache to delete, access the Settings-> Privacy and Security tab and choose Delete browsing data.