Version
102 of the Thunderbird email client has been released.

It features refreshed icons, color folders, and quality-of-life
upgrades like the redesigned message header. It ushers in a brand
new Address Book to bring you closer than ever to the people you
communicate with. Plus useful new tools to help you manage your
data, navigate the app faster, and boost your productivity. We’re
even bringing Matrix to the party.

Source: LWN.net – Thunderbird 102 released