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.

How to view saved passwords

At the top of the window click on the applications menu icon. then select preferences.

In the preferences window search using the term Pass as shown below. Thunderbird searches as you type, so the settings shown will change with each new letter typed.

Then click on 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. Click the X in the search bar to clear your search and see the full list again.

How to delete or edit passwords

Open the password manager (see above).

• To edit the username and password for a server, right-clickhold down the Ctrl key while you click on the server's entry from the list and click Edit Username or Edit Password.
  
  
  
  
  
  
• To remove the username and password for a server, select the server's entry from the list and click Remove.
• To remove all stored usernames and passwords, click Remove All. After confirming this choice, all of your stored usernames and passwords will be deleted.