Minimize to system tray (Thunderbird)

Thunderbird cannot minimize itself to the system tray. However, users of Microsoft Windows can try using one of these solutions:

• MinimizeToTray: an extension for both Thunderbird and Firefox.
• Thunderbird-Tray.
• ThunderCalTray.
• One of the general minimize-to-tray utilities mentioned in this MozillaZine Forums thread.

If you use GNOME, KDE, or XFCE, you can use kdocker.