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.
Send and File Requires Restart
Allows to file outgoing messages in folder you prefer
Subject Manager Requires Restart
Manages subject of composed emails.
Edit Email Subject for Thunderbird
HeaderTools Lite Requires Restart
Allows to modify the header and the source of messages
Force a LTR locale to behave as if it was a RTL locale.
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.
Address Close Button Requires Restart
Adds a Address Close Button to mail compose window.
Sun Cult Requires Restart
Worldwide Sunrise, Sunset, Twilight, Moonrise and Moonset...
Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.
Dorando keyconfig Requires Restart
A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)
Copy Plain Text 2 Requires Restart
Copies text without formatting
Moves the toolbar back above the tabbar.
ConQuery Requires Restart
Context searching for everyone and URL manipulation tool for advanced users...
MinimizeToTray For FF 3.5 Requires Restart
MinimizeToTray For firefox 3.Minimizes Mozilla windows into the system tray.Note:I am going to remove this extension if the original creator make a FF 3 version!
Google Keep for Thunderbird
Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.
QuickNote Requires Restart
A simple note-taking extension.
Console² Requires Restart
Protonmail Thunderbird theme Requires Restart
A Thunderbird v68 < theme inspired by Protonmail beta design and based on the Monterail theme of thunderbird