Firefox:

1. Click the Sandwich menu on the far right-hand side of your screen.
2. Click Settings
3. Click Privacy & Security
4. Scroll to Cookies and Site Data
5. Click on the Clear Data... Button
6. Make sure that both boxes are checked
7. Click the clear button
8. Close the browser
9. Reopen the browser and go back to Xephula, you'll need to log in again (as well as all other sites).

Chrome:

1. Click the three dots near your user pic
2. Click Security and Privacy
3. Click Clear Browsing Data
4. Make sure all three boxes are checked
5. Click the Clear Data Button
6. Close the browser
7. Reopen the browser, and go back to Xephula, you'll need to log in again (as well as all other sites).

I only have the two most popular browsers here, it's about the same for both browsers, as it will be for all other off-shoots on the market today.