Add-ons
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.122,857 users -
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)21,821 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.21,750 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.17,966 users -
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync10,686 users -
This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.10,511 users
Top Rated See all »
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Macro Template is to replace mail templates with macros for date formatting.602 users -
True "Send Later" functionality to schedule the time for sending an email.122,857 users
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Integrates calendars events with Gnome clock applet497 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.17,966 users
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This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.10,511 users
Recently Added See all »
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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.1 user -
Private notes and todos for every site, domain, or exact page path.6 users
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Quickly and easily schedule a Google Meet invite and Google Calendar event directly from Thunderbird.
Right-click any email to open the scheduler — attendees, timezone, and agenda are pre-filled automatically from the message.78 users -
Unofficial Google Calendar add-on for Thunderbird, it adds a button in Spaces that opens a Google Calendar tab in Thunderbird.155 users -
Create calendar events or tasks from emails using AI parsing22 users -
Open Security Deadlines (https://sec-deadlines.github.io/) in a Thunderbird Tab. No affiliation with the original website.1 user
See all 88 extensions in Calendar and Date/Time »
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