Appearance and Customization

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Font PT Selector

Permette di applicare la dimensione in punti anziché in pixel!

In tanti chiedevamo questo nei forum, per cui spero che vi sia utile!

Rated 3 out of 5 stars (1)
3 users
Added Nov. 7, 2025

X-Header-To-Column

Erlaubt beliebige X-Header als Spalten darzustellen.
Unterstützt eine Ampeldarstellung für zahlenbasierte Werte (z.B. Spam-Score) mit variabler Einstellung der Ampelfarben.

Not yet rated
1 user
Added Oct. 21, 2025

ThunderFeed - Read Email Like RSS

Transform email folders into Hey.com-like RSS-style reading experience. Read your emails like a news feed - scroll through messages in a continuous stream, and they're automatically marked as read as you scroll past them

Not yet rated
17 users
Added Oct. 3, 2025

Trello Task Creator

Create Trello tasks directly from Thunderbird emails. Select boards, lists, add custom titles and descriptions. Secure credential storage with connection testing. Streamline your email-to-task workflow.

Not yet rated
13 users
Added Sept. 21, 2025

Message Sent Sound

I missed an acoustic notification when an e-mail was sent and it seems (at least on MacOS) this is no native Thunderbird feature. So I created this quick, little AddOn which allows you to set an MP3 file that will be played if your message was sent.

Rated 5 out of 5 stars (1)
76 users
Added Sept. 12, 2025

DynSign

DynSign is a Thunderbird extension that dynamically inserts a signature into your emails. It allows you to keep your email signature up to date without having to manually edit it in Thunderbird.

https://github.com/Vozodo/DynSign

Not yet rated
37 users
Added Aug. 21, 2025

Double Click Test

Rated 1 out of 5 stars (1)
0 users
Added Aug. 19, 2025

Retrieve Remote Avatar

This experimental addon for Thunderbird fetches a remote avatar from various sources if one isn't already set.

By default this addon pulls from libravatar. Custom providers can also be set.

Not yet rated
13 users
Added June 29, 2025

Strikethrough Button

Adds a strikethrough toggle button to the Thunderbird compose toolbar. As this is an extension, it is not an integrated component of the Thunderbird toolbar. That is why it sits at the far right on the toolbar and not next to the B/I/U buttons.

Rated 3 out of 5 stars (2)
45 users
Added June 23, 2025

Thunder Sign Editor

Thunder Sign Editor ✍️
Visual signature editor for Thunderbird (WYSIWYG)

Thunder Sign Editor is a lightweight Thunderbird extension that lets you visually design, copy, and apply email signatures to any of your Thunderbird identities.

Rated 5 out of 5 stars (2)
210 users
Added May 5, 2025

ThunderSearch

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

Not yet rated
49 users
Added April 5, 2025

Webpage Print from Context Menu

Print the current webpage from the context menu

Not yet rated
52 users
Added April 5, 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
20 users
Added Feb. 10, 2025

F9 Hides the Folder Pane

Press F9, or your favourite shortcut, to toggle the visibility of the Folder Pane

Rated 5 out of 5 stars (2)
107 users
Added Jan. 16, 2025

SpaceApper

Add custom webpages to the spaces toolbar.

Rated 5 out of 5 stars (1)
79 users
Added Dec. 11, 2024

Toggle Dark Reader

Adds a Toggle Dark Reader button

Rated 1 out of 5 stars (1)
110 users
Added Nov. 14, 2024

AutoZoom

AddOn to save a text zoom for eMail text editor.

Rated 4 out of 5 stars (4)
199 users
Added Nov. 6, 2024

Outlook Calendar - Quick Access

This extension adds a simple button to your Spaces toolbar that opens in a new tab, providing you with one-click access to Outlook Calendar.

Rated 3 out of 5 stars (7)
821 users
Added Oct. 30, 2024

Calendar/Project Tools: Gantt-/Year View, Planner

*Display Gantt View and Year View
*Task Time Planning: daily, distribute your open tasks into open time slots.
*Show parent/child relationships for tasks

Rated 5 out of 5 stars (1)
252 users
Added Oct. 28, 2024

PrettyBlockquote

The add-on ensures that the quoted text in your reply is clearly highlighted with a vertical blue line, even when viewed by recipients using different email clients like Gmail or macOS, by using inline CSS on the blockquote HTML tag.

Rated 5 out of 5 stars (3)
62 users
Added Oct. 18, 2024