Add-ons
Message and News Reading
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Thunderbird Conversations
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.
24,251 users
Most Popular See all »
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LookOut decodes winmail.dat (TNEF encoded) files that may come from a misconfigured Microsoft Exchange server or Outlook user allowing access to the original attachments
Support: Thunderbird133,973 users -
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).103,156 users -
The best Translator for Thunderbird!
Supported translators:
Google Translate
Microsoft Translator
DeepL
Yandex
Яндекс Переводчик
Google 翻译
百度翻译56,690 users -
Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).43,122 users -
PrintingTools NG enables many layout and formatting options for printing messages with header borders, sorting, attachment lists etc. PDF output can be auto named and Page options can ease printer settings.
It is your printing toolbox.25,840 users -
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.24,251 users
Top Rated See all »
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Word translation in tooltip with English⟷Croatian dictionary already incorporated.0 users -
Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion.645 users -
No Message Pane Sort prevents accidental resorting of the message pane by disabling mouse button clicks on the column headers, thus, locking the sorting order of your emails.
It is still possible to sort messages by ctrl-clicking the header.3,804 users -
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!13,681 users
Recently Added See all »
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You may need to install https://yellowgnu.com/wp-content/uploads/2026/07/OpenLinkWith-Windows-Helper-1.0.3.zip
Install the XPI in Thunderbird, then extract and run install-host.bat from the Windows helper ZIP.1 user -
Adds a toolbar button that opens a panel listing every starred (flagged) email from all your accounts and folders in one place. Click any message to open it, or click its star to unstar—so nothing important slips away. Fast, private, all local.1 user -
Organize Thunderbird mail with flexible rules, previews, schedules, logs and undoable automation.1 user -
A Thunderbird extension that integrates AI assistance directly into the compose window, letting users draft replies, fix grammar, translate text, and adjust tone without leaving the email client.4 users -
Fast, typo-tolerant email search with its own index. It finds mail Thunderbird's
built-in search misses, ranks the best matches first, and keeps itself up to date
as your mail changes. No internet access — everything stays on your computer.1 user -
Parse Isabelle escape codes and replace them by unicode representation0 users
See all 553 extensions in Message and News Reading »
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