Mozilla Firefox - Clear Browser Data

1. In the Firefox browser visit the website:  about:preferences#privacy
2. Once on that webpage, scroll down to the section "Cookies and Site Data" and click the "Clear Data..." button.
3. In the window that appears ensure the checkboxes next to "Cookies and Site Data" and "Cached Web Content"  are checked and finally click "Clear" at the bottom of the box.
4. Navigate back to to the event page and refresh. You will need to log back into the event.