Top-Rated Extensions

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Repeat Borders Requires Restart

Adds darker borders to repeat events to distinguish them from single events.

Rated 4 out of 5 stars (1)
368 users

Mutt Keys Requires Restart

Creates Mutt like key bindings for Thunderbird. Inspired by the mouseless extension.

Rated 4 out of 5 stars (1)
26 users

ICS Inspector Requires Restart

This extension provides many debugging options related to calendar development. This includes showing the ics data for an event or calendar, evaluating javascript on an event or calendar, and some menu options for debugging.

Rated 4 out of 5 stars (1)
1,038 users

Preferential (New GUID) Requires Restart

Advanced preferences manager for Mozilla-based...

Rated 3 out of 5 stars (5)
17 users

Spamato4Thunderbird Requires Restart

A multi-faceted, collaborative approach against spam.

Rated 2 out of 5 stars (31)
0 users

mouseless Requires Restart

I did my best so that operation might be possible with a keyboard...

Rated 2 out of 5 stars (7)
0 users

Classic Pop-up Alerts

This addon returns the old view of the pop-up notifications, as in Firefox 4.0 - 43.0

Rated 3 out of 5 stars (2)
451 users

Large Fonts Requires Restart

This add-on enables you to change the font size of the plain text editor of Thunderbird.

Rated 3 out of 5 stars (2)
383 users

Email Addresses in Message Headers Requires Restart

Shows email addresses in message headers, including those of contacts, and provides control over message header presentation.

Rated 3 out of 5 stars (2)
222 users

Consigna para Filelink Requires Restart

Plugin para subir ficheros a Consigna (Junta de Andalucía) de forma automática desde Thunderbird.
Está ideado para el intercambio de ficheros de gran tamaño. Es un espacio de almacenamiento temporal y con algunas restricciones de acceso opcionales.

Rated 3 out of 5 stars (2)
1,818 users

gTimer Requires Restart

gTimer предназначен для подсчёта времени, проводимого за работой в Firefox.

Rated 3 out of 5 stars (2)
13 users

eelpout Requires Restart

The anti-phish. An informative phishing detection...

Rated 3 out of 5 stars (2)
0 users

Folder Selection (Thunderbird) Requires Restart

A popup window for selecting any folder when the folder pane is hidden...

Rated 3 out of 5 stars (2)
0 users

Google Mail Tab for Thunderbird Requires Restart

Open Google Mail in a new tab inside of Mozilla Thunderbird

Rated 3 out of 5 stars (2)
0 users

Find Buttons

Adds buttons to open and manage the find bar.

Rated 3 out of 5 stars (2)
122 users

GmailOutOfOffice Requires Restart

Out of Office for Gmail

This add-on allows you to set an out of office auto-responder in your gmail account. It adds a button in the toolbar customization list.

Rated 4 out of 5 stars (1)
313 users

CardDAV Browser Requires Restart

A utility to browse vCards stored on a CardDAV server.

Rated 2 out of 5 stars (7)
1,206 users

Follow Reply Requires Restart

Find the replying or the following mail you wrote by clicking the arrow icon in the subject column of the thread panel

Rated 2 out of 5 stars (10)
180 users

RSS Dashboard Requires Restart

This addons gives you a dashboard-style view of your RSS feeds, like iGoogle or Netvibes (widget view). This is an experiment, so it is still very rough. Right now, consider this as a proof-of-concept rather than a real addon.

Rated 3 out of 5 stars (3)
62 users

FileRun for Filelink Requires Restart

Add FileRun support to Thunderbird's Filelink feature.

Rated 3 out of 5 stars (2)
217 users