Folders and Filters
Archive This Requires Restart
Provides keyboard shortcuts for filing messages into nine configurable "favorite" folders using user-defined keys. Also provides a simple filter system with a keyboard shortcut to file the currently selected message(s) into the correct folder.
attachment column in search result list Requires Restart
Show the column for attachments in search results list. General search (edit-> search -> search emails) does not show by default if a message has attachments.
This addon adds this column, just as in a normal folder view.
Auto Filter Timer Requires Restart
Run existing message filters on any folder at a specified interval. Simply right-click the desired folder then choose from the [AUTOFILT] menu items. This is a hack/clean-up of another coder's work, but works perfectly. Use at your own risk
Automatically do Archive/Copy/Delete/Move actions based on user defined rules
CapsKiller Requires Restart
Caps Killer is a protection against newbies using caps in their mails.
Collapsed Unread Requires Restart
Shows unread email count for collapsed folders even if the unread mails are in subfolders.
Color Folders Requires Restart
Color your Folder Treeview Icons!
Colored Folders Requires Restart
Add colors to your folders in Thunderbird!
Must-have for better organisation + intuitive and speedy workfow...
This is project "Color Folders" (originally by Fisheater), corrected, resurrected, restaurated, extended and republished.
Copy Folder mod Requires Restart
I corresponded to thunderbird 60 or later
Count Filters Requires Restart
This add-on provides various search filters couting values, such as total number of recipients, or number of lines, words,links in body message.
Delete Only Empty Folder Requires Restart
Disallows to delete not-empty mail folders.
DetachAttachment - Attachment clipper, Extractor Requires Restart
This addon provides functionality of bulk delete attachments of selected messages.
Delete-command is added to the messages' context menu.
Disable DragAndDrop (Thunderbird) Requires Restart
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.
EmailPicky 4 Requires Restart
Grab email addresses from emails from any selected Email Folder and add them to your contacts. (Email Crawler / Email ID Grabber / Bounced email collector) - Thunderbird Plugin
Note: It doesn't create duplicates, but shows as 'xxx messages added'.
Empty 'em Requires Restart
Empty all your Trash and Junk folders in one fell swoop!
EuropeanMX Spam Reporter Requires Restart
Train your EuropeanMX filter by reporting unrecognized spam or false-positives back to us.
Expression Search / GMailUI Requires Restart
Powerful message searching through expressions. Type "from:fred to:tom" to see all messages from Fred to Tom in the current view. Support 'regular expressions' and 'click to search'.
This addon extends filtering to read messages downloaded during an IMAP synchronization (bug 308148)
Synchronize your favorite RSS sources with Thundebird and Feedly
Flat Folder Tree (updated) Requires Restart
Flat Folder Tree enables you to selectively breakout sub-folders under intermediate folders in the folder pane view. This is an updated version of the existing addon, now compatible with Thunderbird 60.