Up & Coming Extensions


Close tab on ESC Requires Restart

Closes a Mozilla Thunderbird tab when pressing the Escape key.

Rated 5 out of 5 stars (38)
2,810 users

Custom Buttons Requires Restart

Gives a possibility to create custom toolbarbuttons...

Rated 4 out of 5 stars (123)
6,220 users

Lightbird Requires Restart

Standalone calendar UI for Lightning

Rated 4 out of 5 stars (18)
3,032 users

Search Results Sort By Date Not Relevance Requires Restart

Makes search results sort by "date" instead of "relevance" by default.

Rated 5 out of 5 stars (15)
3,081 users

Flex Confirm Mail Requires Restart

Confirm mail address and attachments based on flexible rules.

Rated 3 out of 5 stars (3)
14,479 users

Archive This Requires Restart

Provides keyboard shortcuts for filing messages into nine configurable "favorite" folders using user-defined keys. Also provides a simple filter system with a keyboard shortcut to file the currently selected message(s) into the correct folder.

Rated 5 out of 5 stars (28)
1,427 users

MEGAbird Requires Restart

Add MEGA support to Thunderbird's Filelink feature.

Rated 5 out of 5 stars (11)
2,269 users

Lightning Colors Reminder Requires Restart

Let's show the calendar color on Lightning reminders!

Rated 4 out of 5 stars (3)
5,433 users

Free Memory Button

Free unused memory that Firefox is currently using.

Rated 3 out of 5 stars (8)
2,970 users

Grammar Checker Requires Restart

Checks grammar using LanguageTool.

Rated 3 out of 5 stars (6)
2,919 users

Header Tools Lite Requires Restart

Allows to modify the header and the source of messages

Rated 5 out of 5 stars (27)
5,457 users

GNOME Keyring integration Requires Restart

GNOME Keyring integration

Rated 5 out of 5 stars (11)
1,693 users

InfoNotary Configurator for Mozilla Requires Restart

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 3 out of 5 stars (4)
2,563 users

BiDi Mail UI Requires Restart

Direction control and BiDi-related charset misdetection correction

Rated 4 out of 5 stars (25)
3,143 users

Search as list Requires Restart

Search results appear as list (as per the "Open email as list" button).
- return to facet view with shift+close [x]
- auto open list view when few results found
- column config./sort/toggle [IMG3&4]
- apply columns to search as list menu [IMG5]

Rated 5 out of 5 stars (28)
3,060 users

No Small Text

Set a minimum text size for all web content. Use the toolbar button to switch it on and off. NEW: Three preset sizes. NEW: Use mouse scroll on the toolbar button.

Rated 4 out of 5 stars (17)
2,181 users

Nextcloud for Filelink Requires Restart

"Nextcloud for Filelink" is an Open Source Thunderbird extension which makes it easy to send large attachments with Thunderbird by uploading them first to a Nextcloud server and by then inserting the link into the body of your email.

Rated 3 out of 5 stars (29)
4,722 users

Send Later Requires Restart

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (112)
67,377 users

Expression Search / GMailUI Requires Restart

Powerful message searching through expressions. Type "from:fred to:tom" to see all messages from Fred to Tom in the current view. Support 'regular expressions' and 'click to search'.

Rated 4 out of 5 stars (79)
8,410 users

Leet Key Requires Restart

Transforms typed or static text to L337, ROT13, BASE64, HEX, URL, BIN, DES, AES, Morse code, DVORAK keyboard layout and to lower/to upper case functionality, Leet Font...

Rated 4 out of 5 stars (52)
2,357 users