No specific info about version 38.0 beta. Please visit the main page of Thunderbird--跨平台免費郵件軟體 on Mac Informer.
Strong desktop email client with superior speed and responsiveness time.
Creates complete backups of any Email client in just a few moments.
Escape Velocity: Nova is a top-down shooter and role-playing game set in space.
Migrate emails from Outlook for Mac to other email clients.
Portable version of Mozilla's Thunderbird for you to take your email with you.