Up & Coming Extensions

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Folder Pane View Switcher

Folder view arrows; switch to "All Folders" view when hovering during drag & drop; allow user to select which views are enabled or tied to the view arrows.

Rated 4 out of 5 stars (64)
3,772 users

Old Icons

This replaces the new monochrome icons with the old colorful icons. Based on Phoenity Icons (I only changed some of the icons).

Rated 5 out of 5 stars (14)
1,915 users

Full Address Column

Adds a full sender and recipient e-mail column to message list panel.

Rated 4 out of 5 stars (25)
4,850 users

Grammar and Spell Checker — LanguageTool

Check your emails for spelling and grammar issues

Rated 4 out of 5 stars (18)
21,391 users

MyPhoneExplorer

This Addon is needed to sync your Android based smartphone with Thunderbird with the Software "MyPhoneExplorer"

Rated 4 out of 5 stars (12)
10,084 users

Birthday Calendar

Adds calendars containing the birthdays from your address books.

Rated 5 out of 5 stars (18)
2,836 users

Restart Button

Adds a Restart Button, restarts Thunderbird

Rated 3 out of 5 stars (9)
1,141 users

mailmindr

Follow up for Thunderbird E-Mails.

Web: https://mailmindr.net/
Twitter: @mailmindr

Rated 4 out of 5 stars (63)
2,429 users

FileLink provider for Send

Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).

Rated 5 out of 5 stars (5)
18,098 users

Attachment Extractor

Extract attachments from selected e-mails!

Instructions:
1. Select one or more messages
2. Right click and choose Attachment Extractor
3. Select a template for filenames and target folder
4. Choose to either delete attachments or not
5. Done

Rated 3 out of 5 stars (26)
3,001 users

Hide Local Folders for TB78++

Removes the 'Local Folders' entry from the folder pane.
(The folder itself will stay existent.)
(Based on the original work of Alex Cabal.)

Rated 5 out of 5 stars (13)
3,799 users

WarnAttachment

WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.

Rated 5 out of 5 stars (8)
2,484 users

BiDi Mail UI

Direction control and BiDi-related charset misdetection correction

Rated 4 out of 5 stars (42)
2,167 users

tbkeys-lite

Custom Thunderbird keybindings

This add-on is a follow on to Keyconfig which is no longer supported.

It is aimed at power users. Please look at the GitHub site before leaving a one star review about documentation or usability.

Rated 4 out of 5 stars (38)
2,365 users

Mail Merge P

Mail Merge with Preview, an enhanced version of Mail Merge by Alexander Bergmann. MailMergeP Allows you to send bulk messages based on a spreadsheet of data.

Rated 3 out of 5 stars (8)
1,311 users

Toggle Headers

Allows to switch between the normal header view and viewing all headers when viewing a message by using a keyboard shortcut (Ctrl+H).

Rated 4 out of 5 stars (11)
1,270 users

Emoji

It permits just with a single click to copy an emoji.
There is a search-box and the "Most used emojis" section (the first one).

If you want to send feedback or report bug, please go to https://github.com/Sav22999/emoji

Rated 5 out of 5 stars (4)
2,665 users

Search Button

Toolbar button to invoke message search dialog window.

Rated 5 out of 5 stars (8)
1,965 users

Addon Compatibility Check for TB 102

Checks all installed add-ons for compatibility with Thunderbird 102 (next ESR) and displays status information on a button in the main toolbar. This button will open a detailed overview, including links to alternatives for abandoned add-ons.

Rated 5 out of 5 stars (3)
11,446 users

Simple Startup Minimizer

This extension will minimize Thunderbird on startup, it is very simple and I didn't put much work into it but it should work on all platforms. Please let me know if you want more features added into it.

Rated 4 out of 5 stars (20)
3,265 users