Folders and Filters
CapsKiller Requires Restart
Caps Killer is a protection against newbies using caps in their mails.
Synchronize your favorite RSS sources with Thundebird and Feedly
Empty 'em Requires Restart
Empty all your Trash and Junk folders in one fell swoop!
Folder Levels Requires Restart
Rank your email folders by how much you care about them, and hide the ones you don't need right now.
SavedSearchThemAll Requires Restart
A Thunderbird extension to automagically extend all the saved searches to all the foders!
Collapsed Unread Requires Restart
Shows unread email count for collapsed folders even if the unread mails are in subfolders.
SavedSearchInSubFolders Requires Restart
This addon allows virtual folders (saved searches) to automatically process all subfolders of their selected target folders.
The search targets are updated automatically whenever a new folder is added, or a virtual folder is updated.
folderplus Requires Restart
This extension adds some basic missing features about folders.
Move mails to their conversation folder. Navigate to folder with new keyboard shortcuts.
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'.
Shedule Filters Requires Restart
Sheduled run message filters
Запуск фильтров сообщений по расписанию
Delete Only Empty Folder Requires Restart
Disallows to delete not-empty mail folders.
SmartFilters Requires Restart
Tired of writing a lot of filters? Install SmartFilters now to organise your mailbox automatically. It can sort out your mailing lists and robot emails.
Automatically marks all messages in the [Gmail] folder and all subfolders as read.
This addon adds an entry in the right-click menu which re-threads selected messages together (groups selected messages into the same thread)". This is done by _modifying_ messages; the author of the addon declines any responsibility for data loss.
Protected E-mail Addresses Requires Restart
Generates protected and disposable e-mail addresses and filters junk mail sent to invalid addresses.
Cleans your Firefox, Thunderbird, SeaMonkey, Fennec (unstable), Instantbird and BlueGriffon.