the release of the Thunderbird 78.2.2 mail client, which implements support for regrouping email recipients in the Drag&Drop mode. Removed Twitter support from chat, which was in a broken state. The built-in implementation of OpenPGP has improved key import failure handling, improved online key lookup, and resolved decryption issues when using some HTTP proxies. Ensured correct processing of vCard 2.1 attachments.
Source: opennet.ru