Thunderbird will remember your username and password for each account and outgoing server, and store them in the password manager. If you try to access a server in which you don't have a username or password saved, Thunderbird will prompt you to enter it, and offer to remember what you've entered. Table of Contents 2 How to delete or edit passwords How to view saved passwords At the top of the Thunderbird window, click the Tools menu and select OptionsIn the menu bar, click the Thunderbird menu and select PreferencesAt the top of the Thunderbird window, click the Edit menu and select Preferences, or click the menu button and choose OptionsPreferences. Go to the Security panel, select the Passwords tab, and click Saved Passwords. To see the passwords you have saved, click Show Passwords. When you close the window, your passwords will be automatically hidden. Use the search box to find a particular account or username.