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.
IMAP Received Date Requires Restart
Make the “Received” column in IMAP folders show when messages were actually received.
'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.
Disable DragAndDrop (Thunderbird) Requires Restart
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.
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.
Stop Ignoring Reply:To Requires Restart
Default "Reply" functionality pays attention to "Reply-To" in original email
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+ ]
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 Requires Restart
Manages subject of composed emails.
This add-on offers ui tweaks to improve Thunderbirds appearance (squared tabs, custom tab height, alternative Add-on Manager appearance, compact main toolbars and more).
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.
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, ...)
ResetRec Requires Restart
ResetRec allows you to reset the recipient list.
EHTip Requires Restart
Word translation in tooltip with English⟷Croatian dictionary already incorporated.
Send and File Requires Restart
Allows to file outgoing messages in folder you prefer
If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.
No Message Pane Sort by Mouse Requires Restart
No Message Pane Sort prevents accidental resorting of the message pane by disabling mouse button clicks on the column headers.
It is still possible to sort messages by ctrl-clicking the header.