Changing your email password in Mozilla Thunderbird can help enhance the security of your email account. Follow these simple steps to update your email password:

1. Open Thunderbird on your computer.
2. Go to 'Tools' and select 'Options'.
3. In the 'Security' tab, click on 'Passwords'.
4. Click on 'Saved Passwords'.
5. Find and select the email account for which you want to change the password.
6. Click on 'Remove' to delete the saved password.
7. Next time you check your email, Thunderbird will prompt you to enter the new password.

It's important to regularly update your email password to prevent unauthorized access to your account. By following these steps, you can ensure that your personal information stays secure.