Add-ons
Calendar and Date/Time
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Send Later
True "Send Later" functionality to schedule the time for sending an email.
75,874 users -
TbSync
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.
38,988 users
Most Popular See all »
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Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.7,039,924 users -
True "Send Later" functionality to schedule the time for sending an email.75,874 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.38,988 users -
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)23,307 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.21,100 users -
This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, Google, ownCloud, Nextcloud, Radicale and many more.21,078 users
Top Rated See all »
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Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync19,116 users -
True "Send Later" functionality to schedule the time for sending an email.75,874 users
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This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, Google, ownCloud, Nextcloud, Radicale and many more.21,078 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.38,988 users
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Configure the 'Date' and 'Received' columns and displayed date in the message pane using custom formats. You can even use different date formats for emails with today's date, yesterday's date, dates in the last week, or dates older than a week.80 users -
This add allow to customize the snooze delay when snooze popup appears (lightning required).782 users
Recently Added See all »
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Adds a button to open Google Calendar in a new Tab716 users -
Abrir URL de G Suite en pestañas (por el momento solo están los botones de Calendar y Keep)161 users -
Add Microsoft Office 365 Tabs to Thunderbird! Services supported by M-Hub Lite: Calendar, People, OneDrive, Word, Excel, PowerPoint, & Bing. Need business or enterprise support? Get M-Hub Pro: https://www.schiffner.com/software/m-hub-pro174 users -
Allows custom synchronization intervals for remote calendars imported by Lightning Calendar (no fiddling in about:config necessary)399 users
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Configure the 'Date' and 'Received' columns and displayed date in the message pane using custom formats. You can even use different date formats for emails with today's date, yesterday's date, dates in the last week, or dates older than a week.80 users
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An extension to show embedded Outlook calendar (vcal / ics) parts.
Thunderbird doesn't show calendar parts from Outlook appointment emails. This addon adds a button to download the embedded appointment as ICS to import it into another calendar.513 users
See all 49 extensions in Calendar and Date/Time »
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