Miscellaneous

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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.

Rated 4 out of 5 stars (83)
1,708 users

Unsubscribe

Lightweight solution to simplify unsubscribing from newsletters

Rated 3 out of 5 stars (16)
1,542 users

Restart Button

Adds a Restart Button, restarts Thunderbird

Rated 4 out of 5 stars (12)
1,408 users

Open Google Tasks

Adds an icon on the spaces toolbar to quickly open Google Tasks

Rated 4 out of 5 stars (3)
1,218 users

Thunderbird Todoist

Extension to add emails as tasks to Todoist.

Rated 5 out of 5 stars (10)
1,210 users

ChatGPT - Quick Access

Quick Access to ChatGPT in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 4 out of 5 stars (2)
1,152 users

Add Signature Requires Restart

Simply add your signature manually (right mouse click) to your emails

Rated 3 out of 5 stars (55)
1,121 users

IMAP Quota (Free Space) Requires Restart

This Thunderbird addon lets you customize the IMAP quota statusbar panel.

Rated 4 out of 5 stars (13)
1,071 users

Attachment Saver

Saves all attachments from multiple selected emails as a single zip file.

It provides an extra option in your context menu when selecting emails.

Rated 5 out of 5 stars (12)
1,048 users

MinimizeToTray revived Requires Restart

Minimizes windows into the system tray.

Rated 4 out of 5 stars (395)
895 users

Whatsapp - Quick Access

Quick Access to Whatsapp Web in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 5 out of 5 stars (2)
847 users

OpenAttachmentByExtension

Open the attachment by extension and not by mimetype

Rated 5 out of 5 stars (3)
846 users

PrintingTools Requires Restart

Adds some options to print messages and addressbooks

Rated 4 out of 5 stars (44)
820 users

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.

Rated 4 out of 5 stars (52)
800 users

Microsoft Teams - Quick Access

Quick Access to Microsoft Teams in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 4 out of 5 stars (2)
767 users

ThunderStats! Your Thunderbird Statistics!

Do you remember the old good Eudora statistics? Do you miss them?
Using this addon you can finally keep an eye on how you use your beloved Thunderbird!

Rated 5 out of 5 stars (9)
700 users

Microsoft To Do - Quick Access

Quick Access to Microsoft To Do (Live) in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 5 out of 5 stars (1)
553 users

Gemini - Quick Access

Quick Access to Google Gemini AI (formerly Bard) in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 5 out of 5 stars (1)
453 users

Unified Folders Debugging

An add-on to help debugging problems with the Unified Folders mode.

Rated 4 out of 5 stars (13)
450 users

Evernote Tab

Add a button and a menu to open Evernote in tab.

Rated 3 out of 5 stars (9)
341 users