Add-ons
Calendar and Date/Time
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Multimonth view
Multimonth View allows users to display multiple months in a single calendar view,
Open Google Tabs
Open up Google Calendar, Notes, and Microsoft Outlook in a new tab.
Dropbox Paper
How Does It Work?
Once you install the add-on, a new icon will appear in the Thunderbird toolbar. Simply click on the icon, and it will open the Dropbox Paper tab.
Will the Dropbox Paper Add-on Collect My Data?
Never.
Copy Timestamp
Copy the timestamp and/or email addresses of the sender, recipient, etc. to the clipboard in various formats.
Proton Calendar Toolbar Button
Adds a Proton Calendar button to the toolbar. The button simply opens a new tab with the https://calendar.proton.me webpage.
Outlook/Teams Appointments
Get the hidden appointment from an email from outlook/teams as a .ics-file - Icon: https://fontawesome.com/
Birthday Calendar
Adds calendars containing the birthdays from your address books.
Date detection
Turn the dates and time references in your email (e.g. "tomorrow", "in 2 hour") into clickable links. Clicking them will create an event at the corresponding date.
Mahoor-Iranian-Date
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.
GCalTab
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.
Iranian Date For Thunderbird
Requires Restart
Adds a new Iranian(Persian/Jalali) date column to Thunderbird.
Google Calendar Tab
marked-lightning
Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
M-Hub Lite
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-pro
Custom sync interval for Lightning Calendar
Requires Restart
Allows custom synchronization intervals for remote calendars imported by Lightning Calendar (no fiddling in about:config necessary)
Enhanced Date Formatter
Requires Restart
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.
Show Outlook Appointments (vcal / ics)
Requires Restart
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.
Open Google Calendar
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)
Provider for Exchange ActiveSync
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync
To create your own collections, you must have a Mozilla Add-ons account.
