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AttachExtraTools Requires Restart

This extension gives more options and tools to attach files from compose window.

Rated 4 out of 5 stars (12)
44 users

Český slovník kontroly pravopisu (bez diakritiky)

Slovník pro kontrolu pravopisu u textů bez diakritiky pro aplikace Mozilla

Rated 4 out of 5 stars (8)
2,403 users

Thunderbird Taiga Integration Requires Restart

Convert mails to user stories, tasks and tickets for the Taiga project management system. See https://pehei.de/post/thunderbird-taiga-integration for instructions.

Not yet rated
0 users

Tiny JavaScript Debugger

TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.

Rated 5 out of 5 stars (8)
60 users

URLFilter

Block advertisement and access to adult sites

Rated 4 out of 5 stars (23)
14 users

SMTP Switch Reborn Requires Restart

SMTP Chooser.

Rated 4 out of 5 stars (7)
22 users

ExtendIMAPFilters

This addon extends filtering to read messages downloaded during an IMAP synchronization (bug 308148)

Rated 5 out of 5 stars (3)
8 users

Expand mailing list recipients Requires Restart

Adds a toolbar button to expand address book lists to its recipients - useful to stripe out some of them when sending mail...

Rated 4 out of 5 stars (20)
23 users

Any Confirmation Message before Send Requires Restart

You can set Any Confirmation Message before Send.

Rated 5 out of 5 stars (4)
11 users

Forward Requires Restart

Add Inline / As Attachment option to Forward button and Message context menu.

Rated 4 out of 5 stars (25)
104 users

Great DANE Requires Restart

Retrieve DANE S/MIME Certificates for Encryption/Signing.

This extension enables users to automatically retrieve S/MIME certificates using the Great DANE Engine (https://github.com/grierforensics/Great-DANE-Engine).

Not yet rated
0 users

ZNotes Requires Restart

Save everything you like. Simple text notes and pages downloaded from the internet, rich multimedia. Store any files and contacts from your address book with notes.

Rated 5 out of 5 stars (15)
3 users

SavedSearchThemAll Requires Restart

A Thunderbird extension to automagically extend all the saved searches to all the foders!

Rated 4 out of 5 stars (2)
16 users

TitleCase For Thunderbird Requires Restart

Transform strings into Title Case, Proper Case, Start Case, Camel Case, Upper Case, and Lower Case. Highlight your text and only changing what you highlighted.

Rated 4 out of 5 stars (14)
202 users

Squared Australis Tabs (Tb)

A small and simple extension, which replaces the curved tabs of the Australis design with squared ones, similar to Thunderbird v14 and prior.

Rated 4 out of 5 stars (9)
12 users

Reply to All as Cc Requires Restart

Send a reply for recipients as CC except the sender, when you do "Reply to All".

Rated 4 out of 5 stars (11)
27 users

Xuxen

Xuxen Basque dictionary.

Rated 5 out of 5 stars (11)
1,413 users

ThunderPlunger Requires Restart

Sorry but this addon is no longer supported in TB 60. See below.

This add-on provides a few new ways to keep Thunderbird clean.

Rated 4 out of 5 stars (31)
28 users

Colorific

Colorize entire web pages. Configure themes using sliders and drag-and-drop. Set domain preferences for automatic coloration.

Rated 4 out of 5 stars (14)
5 users

Outgoing Message Format Requires Restart

Set the default outgoing message format to Auto-Detect, Plain Text Only, Rich Text (HTML) or Plain and Rich (HTML) Text.

Rated 4 out of 5 stars (15)
25 users