Choyikira cha 64-bit ndi phukusi mumtundu wa MSI zakonzedwa kwa Windows;
Anawonjezera injini yoyang'anira mfundo zosinthira pakati pamabizinesi omwe amagwiritsa ntchito Windows Group Policy kapena posamutsa makonda mu fayilo ya JSON;
Protocol ya IMAP imathandizira TCP keepalive kusunga kulumikizana kosalekeza;
Malo olumikizirana a MAPI tsopano ali ndi chithandizo chonse cha Unicode ndi chithandizo cha mawonekedwe MAPSendMailW;
Chitetezo chowonjezera kuti musagwiritse ntchito mbiri yatsopano yotulutsidwa mumtundu wakale wa Thunderbird chifukwa cha zovuta zomwe zingachitike.
Mukayesa kugwiritsa ntchito mbiri yakale, iwonetsedwa kulakwitsa, yomwe ingalambalale pofotokoza njira ya "--allow-downgrade";
Mu kalendala yokonzekera, zone ya nthawi tsopano ikuphatikiza madera am'mbuyomu ndi zosintha zamtsogolo (zosintha zonse zodziwika za nthawi kuyambira 2018 mpaka 2022 zimaganiziridwa). Nkhani yogawa zochitika yakonzedwanso. Dongosolo lowonjezera la mphezi limalumikizidwa ndi Thunderbird;