Add-ons
Calendar and Date/Time
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TbSync
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.
43,300 users -
Send Later
True "Send Later" functionality to schedule the time for sending an email.
83,232 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.7,016,918 users -
True "Send Later" functionality to schedule the time for sending an email.83,232 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.43,300 users -
This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, Google, ownCloud, Nextcloud, Radicale and many more.24,715 users -
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)23,338 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.20,267 users
Top Rated See all »
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Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync19,690 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.43,300 users
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True "Send Later" functionality to schedule the time for sending an email.83,232 users
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Adds a button to open Google Calendar in a new Tab2,310 users -
This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, Google, ownCloud, Nextcloud, Radicale and many more.24,715 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.65 users
Recently Added See all »
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GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.28 users -
Adds a button to open Google Calendar in a new Tab2,310 users
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Abrir URL de G Suite en pestañas (por el momento solo están los botones de Calendar y Keep)185 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-pro210 users -
Allows custom synchronization intervals for remote calendars imported by Lightning Calendar (no fiddling in about:config necessary)516 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.65 users
See all 50 extensions in Calendar and Date/Time »
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