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Mozilla Thunderbird 159 Email Client Improves Tray Icon Support on Linux

Written By
MN
Marcus Nestor
Nov 9, 2026

Continuing its fast, two-week release cycle, Mozilla Thunderbird 159 is here to update the tray icon support for Linux systems to indicate unread mail and show the message count in the tooltip, and to introduce automatic detection of graph calendars when creating a new account.
MN

Marcus Nestor

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