Appearance and Customization
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.
Hide Local Folders Requires Restart
Removes the "Local Folders" entry from the folder pane.
Monterail Dark, a Thunderbird theme inspired by the mockup of Monterail
Dark mode for every email. Take care of your eyes, use dark theme for night and daily messaging.
Menu Wizard Requires Restart
Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey
Blinking Alert Requires Restart
Adds blink feature to the new-mail alert.
You can also disable auto-hiding of the alert.
A theme that switches between sun and moon based on time of day.
This is the canonical example dynamic theme published by Mozilla: https://github.com/mdn/webextensions-examples/tree/master/dynamic-theme
Set Default Columns Requires Restart
Provides ability to set default visibility of columns in the thread pane.
globalChrome.css Requires Restart
Provides global user stylesheet.
Provides ability to override UI elements' label, tooltip text, etc.
Color Folders Requires Restart
Color your Folder Treeview Icons!
DeepDark for Thunderbird Requires Restart
Dark mode for Thunderbird UI
Maximize message pane by collapsing the thread pane. You can read a message in larger area without opening a new message window...
Disable drag and drop on the folder tree in order to prevent unintended folder movement.
Toolbar button to invoke message search dialog window.
Removes the 'Local Folders' entry from the folder pane.
(The folder itself will stay existent.)
(Based on the original work of Alex Cabal.)
Custom Thunderbird keybindings
Show All Body Parts Requires Restart
Enable the View | Message Body As | All Body Parts message display mode.
It's an extension that changes the format of reply header.
You can choose between the standard Thunderbird reply header, a detailed reply header or a Customized reply header.
You can configure it in the Tools ->Add-on Preferences -> changeQuote.