Add-ons
Folders and Filters
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AutoMover
Mark All Read:WE
Mark all read (Web extension) - Adds a toolbar button to mark all unread messages in current folder as read.
*Note*
This addon works much better in newer versions of Thunderbird (v91). Thunderbird's WebAPI's were very patchy in older versions.
RepSel: Reply to all selected mails
Reply to all selected messages with a single button press. E.g., compose a reply to all emails in a folder or those matching a search. Req. permissions: menues to add UI, messageRead to get sender, compose to add recipients, storage for settings.
Copy Folder mod
Requires Restart
I corresponded to thunderbird 60 or later
Copy Folder
original:
https://addons.thunderbird.net/ja/thunderbird/addon/copy-folder/
archive-by-time
With the filter function comes with thunderbird, all emails met rules will be moved to a specific folder. As time passed the folder would grew bigger and I wanted to put all emails into sub folders classified by year.
AutoBucket
This is an extension function that classifies emails into multiple buckets using AI(the Bayesian filter) and tags them.
Filter email folders
Filter mail folder tree by keyword.
For those with many folders.
This add-on was made based on `Hide Email Folders 3.0.0 persiancity@gmail.com` and `Search Button 2.3.0 SearchButton@pharqcon.com`.
YNote
Requires Restart
Make some text notable on the each folder in folder's property dialog box.
Thunderbird Email 2 CSV Exporter
This add-on has been thoroughly tested on all platforms up to Thunderbird version 115. It allows you to target specific file folders and tag them for export, generating a CSV-formatted export file. Great for a large number of emails and Mailchimp.
Thread in same folder
Runs after junk classification and filtering to make sure a newly-received message lands in the same folder as its parent in a thread.
Nostalgy++/ Manage, search and archive emails
Shortcuts to move/copy/archive messages, with folder name completion.
Rules for moving messages to folders.
Automatic rules by statistical observation/ by folder of conversation/thread.
Search dialog in a tab, with message display /folder tree.
Thunderkey
Hide Duplicates From 'All Mail'
Hides duplicate emails from the 'All Mail' folder upon clicking on a result from Global Search, so that if one email is in both the 'All Mail' folder (e.g. of Gmail) and another folder (e.g. 'Sent'), it'll only show the email from the other folder.
Archive 3 Month
Archive messages that are older than 3 months in inbox and sent folder
ShowFolderSize-T
Requires Restart
Shows folders size on disk.
This add-on is a fork of ShowFolderSIze.
https://freeshell.de//~kaosmos/index-en.html#foldersize
Message Mover
This add-on lets you move messages from a specific folder (and sub-folders) to a new folder.
Send then Archive
Automates the process of archiving a message that has been replied to.
Flat Folder Tree Reborn
Requires Restart
Flat Folder Tree Reborn is an update of the Flat Folder Tree add-on, which allows you to selectively promote or breakout sub-folders in the folder tree. Use with IMAP servers where some folders remain collapsed under a special namespace like [Gmail].
Archive old messages
A context menu item to archive all messages than older than a given duration.
Group Favorite Folders
An extension for Thunderbird 115+ (Supernova) that groups and sorts favorites folders in the compact view.
To create your own collections, you must have a Mozilla Add-ons account.
