Add-ons
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.107,266 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.69,329 users -
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync33,587 users -
This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.27,523 users -
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.27,492 users -
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)22,905 users
Top Rated See all »
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Macro Template is to replace mail templates with macros for date formatting.541 users -
True "Send Later" functionality to schedule the time for sending an email.107,266 users
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This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.27,523 users
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Integrates calendars events with Gnome clock applet778 users
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This add allow to customize the snooze delay when snooze popup appears (lightning required).729 users -
Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.51 users
Recently Added See all »
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This extension adds a simple button to your Spaces toolbar that opens in a new tab, providing you with one-click access to Outlook Calendar.103 users -
Display Gantt View and Year View
Task Time Planning: daily, distribute your open tasks into open time slots.11 users -
Allows to use links to messages in the description field of events and task21 users -
Thunderbird lacks the ability to create and manage allday tasks. This add-on adds these capabilities.116 users
See all 66 extensions in Calendar and Date/Time »
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