Add-ons
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.109,663 users -
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.74,170 users -
This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.39,980 users -
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync34,440 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.28,455 users -
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)23,618 users
Top Rated See all »
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Macro Template is to replace mail templates with macros for date formatting.527 users -
This add-on adds a new column called "تاریخ" ("Date (Persian)" since V1.1.3) in message list containing Iranian Date.
It is reimplementation of Iranian date for Thunderbird 78+ and 115+. The source is based on Full address column by Łukasz Kosson.47 users -
True "Send Later" functionality to schedule the time for sending an email.109,663 users
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This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.39,980 users
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Integrates calendars events with Gnome clock applet754 users
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This add allow to customize the snooze delay when snooze popup appears (lightning required).728 users
Recently Added See all »
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Shows relative date-time in the column.
Note: you need to click "Select columns to display" and then -> "Relative Date/Time"58 users -
Multimonth View allows users to display multiple months in a single calendar view,47 users
See all 62 extensions in Calendar and Date/Time »
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