Rated 5 out of 5 stars

Essential! This is exactly what I've been looking for.
Caused by GoogleCal- and Zindus-Sync, I've always had at least THREE password boxes at each Thunderbird startup, which has been driving me insane for months.
Now with the StartupMaster extension, my peace of mind has returned.
There's only ONE dialog box requesting my master pwd, and it can even be configured to quit the app when cancelling this dialog.
This feature should really be integrated into the Thunderbird & Firefox source code.
Thank you for creating a real timesaver!

This review is for a previous version of the add-on (1.2).