Thunderbird 78.3.0 mail client release. Main changes:
- The native implementation of OpenPGP has improved the performance of large message decryption.
- Added an operation confirmation pop-up window in the Account Setup Wizard that is displayed when connecting to a server using a self-signed TLS certificate.
- Disabled installation of old add-ons (MailExtensions).
- In the message composition interface, the Reply-To header has been moved below the From header.
- Improved design of the sidebar in the calendar-scheduler.
Source: opennet.ru