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Manually sort folders

This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.

Rated 4 out of 5 stars (555)
199,443 users

LookOut (fix version)

LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Support: Thunderbird

Rated 4 out of 5 stars (81)
167,218 users

Remove Duplicate Messages

Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).

Rated 4 out of 5 stars (264)
86,767 users

Owl for Exchange

Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).

Rated 5 out of 5 stars (133)
44,763 users

Thunderbird Conversations Featured

This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.

Rated 4 out of 5 stars (516)
27,478 users

Web Translate

The best Translator for Thunderbird!

Supported translators:
Google Translate
Microsoft Translator
DeepL
Yandex
Яндекс Переводчик
Google 翻译
百度翻译

Rated 4 out of 5 stars (18)
23,754 users

CompactHeader Requires Restart

Add symbol in header plane to switch between compact and expanded view. Work only for Thunderbird 68.0 and older. Currently, there are no plans to update this for newer versions.

Rated 5 out of 5 stars (190)
23,526 users

XNote++ Featured

Persistent sticky notes for Thunderbird associated to mails. You can email them/print/copy to clipboard.

If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.

Rated 5 out of 5 stars (111)
20,583 users

QuickFolders (Tabbed Folders)

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Rated 5 out of 5 stars (177)
18,092 users

Signal Spam

Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).

Rated 3 out of 5 stars (149)
15,141 users

PrintingTools NG

Message Printing Tools (NextGen)

PrintingTools NG provides numerous layout and formatting options for
printing messages with header sorting, attachment lists, borders etc.

Rated 4 out of 5 stars (27)
14,226 users

Mailbox Alert

Mailbox Alert allows you to specify, for each seperate mail folder, a message, sound and/or a system command that will be executed when new mail is found there. ...

Rated 4 out of 5 stars (157)
13,387 users

LocalFolders

Add as many local folders as you want to.
New folders can reside on mapped or network locations.

New 102 version released !

Rated 4 out of 5 stars (34)
12,842 users

Allow HTML Temp

Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).

Rated 4 out of 5 stars (83)
10,190 users

Compact Headers

Limits displayed headers to 1 or 2 lines.

Rated 4 out of 5 stars (52)
9,737 users

ExQuilla for Exchange

Thunderbird email accounts connecting to Microsoft Exchange Web Services.

Rated 4 out of 5 stars (125)
8,199 users

Edit Email Subject (EES)

This module allows you to change/edit email subjects

Rated 4 out of 5 stars (107)
7,888 users

Quick Folder Move

When filing messages, a search box will show up allowing you to quickly enter the folder name you want to move to.

If no search term is entered, a list of recent folders will show up instead.

Rated 4 out of 5 stars (168)
6,781 users

Get/Send Button

The add-on provides a combined Get and Send button with a context menu with additional features.

Rated 4 out of 5 stars (55)
6,410 users

Account Colors Requires Restart

Associates user-defined colors with POP3/IMAP accounts and identities. Applies these colors to accounts, identities, folders, message list, message headers and compose headers. Users will always know which accounts/identities they are working with.

Rated 4 out of 5 stars (169)
5,814 users