Appearance and Customization

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More Snooze

This add allow to customize the snooze delay when snooze popup appears (lightning required).

Rated 5 out of 5 stars (10)
725 users
Updated April 9, 2025

Folders for search, onDisk Status- Glodaquilla-NG:

Global Search/Indexing Enhancements/ On Disk Status for IMAP
Permits selective enabling and disabling of search indexing on folders or accounts - with inheritence. Extra columns can show whether a mail is stored on disk and its indexing status.

Not yet rated
56 users
Updated April 9, 2025

ThunderSearch

Open a Google search browser window in Thunderbird from the context menu

Not yet rated
29 users
Updated April 5, 2025

Webpage Print from Context Menu

Print the current webpage from the context menu

Not yet rated
37 users
Updated April 5, 2025

Emoji

It permits just with a single click to copy an emoji.
There is a search-box and the "Most used emojis" section (the first one).

If you want to send feedback or report bug, please contact me

Rated 5 out of 5 stars (14)
5,944 users
Updated March 26, 2025

Tag Toolbar / Tag Popup

Add toolbar for toggling tags.

Rated 4 out of 5 stars (98)
14,890 users
Updated March 24, 2025

Message Header Toolbar Customize

You can change icon display and button order. You can also hide unnecessary buttons.

Rated 5 out of 5 stars (57)
4,841 users
Updated March 24, 2025

Old (classic) Icons

This replaces the new monochrome icons with the old/classic colorful icons. Uses the code from Phoenity Icons and the graphics from older Thunderbird versions.

Rated 5 out of 5 stars (33)
2,682 users
Updated March 18, 2025

Darko

Simple dark mode (theme) for your Thunderbird messages.

FastAddons.com/#darko

Rated 5 out of 5 stars (34)
6,165 users
Updated March 18, 2025

Group Favorite Folders

An extension for Thunderbird 115+ that groups and sorts favorites folders in the compact view.

Rated 5 out of 5 stars (3)
281 users
Updated March 14, 2025

tbkeys-lite

Custom Thunderbird keybindings

This add-on is a follow on to Keyconfig which is no longer supported.

It is aimed at power users. Please look at the GitHub site before leaving a one star review about documentation or usability.

Rated 5 out of 5 stars (63)
4,657 users
Updated March 10, 2025

Start with Inbox

Selects the latest message in the Inbox after start of Thunderbird.

Rated 4 out of 5 stars (21)
1,864 users
Updated Feb. 13, 2025

New UNEC

New UNEC is a browser extension that transforms the UNEC student panel into a modern and user-friendly interface. It dynamically replaces the existing webpage’s HTML, CSS, and JS with an improved design, featuring automatic dark mode, language.

Not yet rated
25 users
Updated Feb. 10, 2025

Get All Mail Button for TB78++

Adds a toolbar button to get all new messages for all accounts in Thunderbird. When clicked, it does the same as the default button "Get Messages" dropdown menu entry "Get All New Messages".

Rated 5 out of 5 stars (16)
1,458 users
Updated Feb. 9, 2025

Send Unsent Mail Button

Toolbar button to send unsent messages.

Rated 5 out of 5 stars (2)
365 users
Updated Feb. 9, 2025

Mark Button

Toolbar button to mark a message as read or unread with 1 click.

Rated 5 out of 5 stars (7)
265 users
Updated Feb. 3, 2025

Toggle Address Box

Adds a Address Box button, toggles the Address Box in the Composer window

Not yet rated
64 users
Updated Jan. 26, 2025

Toggle Summary

Adds a Toggle Summary button

Rated 5 out of 5 stars (2)
85 users
Updated Jan. 26, 2025

Toggle Inline

Adds a Toggle Inline button

Rated 5 out of 5 stars (1)
115 users
Updated Jan. 26, 2025

Toggle HTML

Adds a Toggle HTML button

Rated 4 out of 5 stars (8)
1,086 users
Updated Jan. 26, 2025