How can I get Thunderbird to require a password in order to open?
I simply need for Thunderbird to require my password in order for it to be opened. It now opens automatically with no password requirement.
Wšykne wótegrona (1)
Try the Startup Master add-on.
https://addons.mozilla.org/en-US/thunderbird/addon/startupmaster/
It shows a welcome dialogue box where you have to enter your Master Password before anything else happens.
I'd suggest you consider the Startup Master approach to be "privacy" rather than "security". A savvy user could start Thunderbird in Safe Mode and thereby disable and circumvent this or any other add-on. But there again they could just copy your profile.
If you're concerned about security rather than privacy, I think you need to look at measures for securing your computer. More ideas here: