Add-ons
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.113,208 users -
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)21,134 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.19,811 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.13,742 users -
This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.8,939 users -
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync8,524 users
Top Rated See all »
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Macro Template is to replace mail templates with macros for date formatting.497 users -
True "Send Later" functionality to schedule the time for sending an email.113,208 users
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Integrates calendars events with Gnome clock applet436 users
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Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.34 users
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TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.13,742 users
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This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.8,939 users
Recently Added See all »
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More than Thunderbird's task list: subtasks, start dates, tags, saved views, advanced filters, shortcuts. Tasks and events on one calendar, plus contacts. Syncs with CalDAV/CardDAV and Tasks.org. Tasks free; Calendar and Contacts Pro after a trial.0 users -
Microsoft 365 / Teams calendar integration for Thunderbird with Microsoft Graph, OAuth2/PKCE and the M365 Space, without the native-calendar Experiment API.2 users
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Point Feed Sentry at any link and it tells you whether the page serves a real RSS or Atom feed, what kind, and how many items it lists right now. A quick way to find a site's followable feeds before you subscribe.1 user
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Vos convocations, questionnaires et attestations Qualiopi rédigés en un clic depuis LogiSign, l'envoi groupé à tous vos apprenants, le suivi Qualiopi, vos salles de visioconférence et vos séances ajoutées à votre agenda : sans quitter Thunderbird.1 user -
Outlook and Teams meeting invitations show up in Thunderbird with no attachment, so there's no way to get them into your calendar. This add-on adds a button that opens them in your calendar app — or right-click it to save the .ics file instead.7 users -
Private notes and todos for every site, domain, or exact page path.10 users
See all 96 extensions in Calendar and Date/Time »
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