Add-ons
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QuickFolders (Tabbed Folders)
Requires Restart
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!
Search Results Sort By Date Not Relevance
Requires Restart
Makes search results sort by "date" instead of "relevance" by default.
Address Close Button
Requires Restart
Adds a Address Close Button to mail compose window.
IMAP Received Date
Requires Restart
Make the “Received” column in IMAP folders show when messages were actually received.
Disable DragAndDrop (Thunderbird)
Requires Restart
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.
Classic Toolbar Buttons [Tb24-58] (discontinued)
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7 small view, Fx4-12 large view & Tb5-14) for current Firefox, Thunderbird and Seamonkey versions.
ThunderHTMLedit
Requires Restart
Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.
NoiaButtons [Tb45-58] (discontinued)
The 'NoiaButtons' add-on offers cartoonish toolbar button icons (known from Noia themes) for default theme and lightweight themes. Further more lite silver and dark versions of Noia themes are included.
Stop Ignoring Reply:To
Requires Restart
Default "Reply" functionality pays attention to "Reply-To" in original email
Open Google Calendar
Requires Restart
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)
GlodaQuilla search indexing enhancements
Requires Restart
Permits selective enabling and disabling of search indexing on folders or accounts - with inheritence. Also adds three columns to the Thunderbird message pane that are useful in debugging.
NewScrollbars [Tb 10-56] (discontinued)
Requires Restart
The "NewScrollbars"-extension replaces default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes".
[ not compatible with Firefox / Thunderbird 57+ ]
CustomizeMyBird
This add-on offers ui tweaks to improve Thunderbirds appearance (classic squared tabs, custom tab height, custom scrollbars, alternative Add-on Manager/Preferences appearance, compact main toolbars, toolbar icon sets and many more).
HTitle (discontinued)
Requires Restart
Hide title bar if window is maximized.
This add-on has been discontinued!
Legacy extensions support will be dropped in Firefox 57. If you interest in CSD on Linux, please track progress on https://bugzilla.mozilla.org/show_bug.cgi?id=1283299.
Subject Manager
Close tab on ESC
Requires Restart
Closes a Mozilla Thunderbird tab when pressing the Escape key.
Grammalecte [fr] (for Thunderbird)
Requires Restart
French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.
ResetRec
EHTip
Requires Restart
Word translation in tooltip with English⟷Croatian dictionary already incorporated.
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