Learn the Basics. Get Started
- Make Thunderbird the Default Mail Client If Thunderbird is specified as your system's default email application, it will integrate with other applications (such as word processors and web browsers).
- Installing an Add-on in Thunderbird How to Install Add-on Extension
- Protect your Thunderbird passwords with a Master Password Make Thunderbird require you to enter a master password in order to view or use passwords you've told Thunderbird to remember.
- Maildir in Thunderbird Discussion of the Maildir interface introduced in version 38.
- Thunderbird Accessibility Features Find out about all of the Accessibility features available in Thunderbird.