Browsers store information in order to make accessing the page easier the next time you visit it, however this can often cause problems when a page makes a change. In order to fix this, you can clear out your browser history.

1. Click on the three horizontal bars in the upper right hand corner.
2. Select History from the menu
3. Select Clear Recent History
4. You can choose from the last hour, the past two hours, past four hours, today and everything
5. Once you have selected your time frame, click clear now
6. Restart Firefox