Appearance and Customization
Customizable LDAP AddressBook Auto Complete Requires Restart
Provides (restores) customizability of auto complete items for LDAP addressbook items, and more features.
Enhanced Priority Display Requires Restart
Enhanced thread pane display of message priorities.
A button to be able to open the profile folder, along with two buttons to create profiles, and also switch the current profile.
Lightning Reminder Left Buttons Requires Restart
Tired to mistakenly press that "Dismiss All" button? Move the Lightining Reminder "Snooze all for" and "Dismiss All" buttons to the LEFT!
... and from version 2.0 you can keep them on the RIGHT, but swapped!
Open about:config to change hidden settings that cannot be edited from the Options window. All Mozilla based programs have settings that can not be changed in the options window.
Extra Format Buttons Requires Restart
Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.
Noia Fox options Requires Restart
Options manager and fixes for Noia Fox theme 3.x.x
Adds buttons to toggle the using the default page colors and fonts, and the page defined colors and fonts.
Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.
Gravatars Requires Restart
Show a column with the Gravatar-picture and sender-name in email folders.
HTitle (discontinued) Requires Restart
Hide title bar if window is maximized.
[!] This add-on has been discontinued.
This extension created only for GNOME 3. It can create problems with another DE. However, you can use HTitle at your own risk (need enable "legacy" mode on settings).
Path Linker Requires Restart
Toggle Folderpane View Requires Restart
This addon provides a toolbar button for toggling between the "All" and "Favorite" views in the folderpane.
Auto Zoomer Requires Restart
Keep a preset zoom level across thunderbird restarts.
Usefull on High DPI screens.
Simple Week View Requires Restart
A simple week view for Lightning, as in the print layout.
Sort and Search Customization Dialogs Requires Restart
Sort and search for buttons in (any) toolbar customization dialog
Mark All Read Button Requires Restart
Adds toolbar buttons to Mark All emails as Read, Mark Thread as Read, and Goto Next Unread Thread.
Displays latest ksbtehchies News in a popup widget
Get all the Latest ksbtehchies News headline with a single click.
Opens a popup widget with the latest news headlines.
Adds personal filters to quickfilter toolbar