Add-ons
Up & Coming Extensions
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BorderColors D
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.
JavaScript Debugger
Requires Restart
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.
Profile Switcher
FlexConfirmMail
Confirm mail address and attachments based on flexible rules.
(This project was renamed from "Flex Confirm Mail" to "FlexConfirmMail", due to a branding reason.)
Folder Account
Lets you associate user accounts and identities with specific folders. Great for multiple users who share TB, or for managing mailing lists.
gContactSync
Requires Restart
Synchronizes contacts & groups between Thunderbird and Google Contacts.
FileLink for Plik
Plik no longer offers uploads without an account. So the add-in currently only works for self-hosted instances of the software. Currently I cannot promise a date for a fix. Sorry.
LocalFolders
Add as many local folders as you want to.
New folders can reside on mapped or network locations.
New 102 version released !
Nostalgy
Requires Restart
Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion.
BiDi Mail UI
Calendar Tweaks
Requires Restart
Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.
FileLink provider for Send
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).
G Suite in tab
Now you can open G Suite App in Thunderbird tabs. (Calendar, Contacts, Keep, Task and Drive)
Lightning Calendar Tabs
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.
Addon Compatibility Check for TB 102/TB 115
Checks all installed add-ons for compatibility with Thunderbird 102 (or TB 115) and displays status information on a button in the main toolbar. This button will open a detailed overview, including links to alternatives for abandoned add-ons.
Hide Local Folders
Requires Restart
Removes the "Local Folders" entry from the folder pane.
Quicktext
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
NestedQuote Remover
Enigmail
Helper tool to migrate your keys and important settings from Enigmail to Thunderbird 78.
Folder Pane View Switcher
Folder view arrows; switch to "All Folders" view when hovering during drag & drop; allow user to select which views are enabled or tied to the view arrows.
To create your own collections, you must have a Mozilla Add-ons account.
