Add-ons
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.129,547 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.21,956 users -
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)21,586 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.14,546 users -
This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.10,405 users -
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync9,036 users
Top Rated See all »
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Macro Template is to replace mail templates with macros for date formatting.626 users -
True "Send Later" functionality to schedule the time for sending an email.129,547 users
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Integrates calendars events with Gnome clock applet438 users
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Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.35 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.14,546 users
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This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.10,405 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.9 users -
Microsoft 365 / Teams calendar integration for Thunderbird with Microsoft Graph, OAuth2/PKCE and the M365 Space, without the native-calendar Experiment API.20 users
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A clear month view in the style of classic desktop planners, in its own tab: flip month by month with the mouse wheel, open, create, hide, compact, export as ICS and delete events (with backup).2 users -
Finds duplicate calendar events – also across calendars –, shows them in groups and deletes the entries you select, with an automatic ICS backup.5 users -
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
See all 93 extensions in Calendar and Date/Time »
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