Rated 5 out of 5 stars

Hello, thank you for this Add-on!
My question is (concerning Thunderbird): I ONLY want to protect my Mail-passwords, that nobody can look at them in "Options / Security / Passwords".
AND I want to send/receive Mails WITHOUT prompt (AND I do not want a prompt at program-start)...
Is that possible? how? thank you very much

This review is for a previous version of the add-on (1.21.1-signed). 

You can't do this with master password, simply because it encrypts the content and password itself not stored anywhere, that's why it asks for it at least once on each start.