Up & Coming Extensions

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Disable Add-on Compatibility Checks

Reinstates the extensions.checkCompatibility preference without respect to the current application version.

Rated 4 out of 5 stars (108)
81,810 users

Add-on Update Checker Requires Restart

Adds Tools menu item to check Add-ons for updates. Includes toolbar icon.

Rated 4 out of 5 stars (56)
20,948 users

GProxy Plus Requires Restart

GProxy Plus lets you set and clear Freegate local proxy in Firefox and Thunderbird, and do more.

Not yet rated
7,670 users

Force Addon Status Requires Restart

Provides ability to change status of specific addon (enabled/disabled).

Not yet rated
2,937 users

Address Move Button Requires Restart

Allow you to add a Address Move Button to mail compose window.

Not yet rated
4,211 users

bulkPaste_recipient Requires Restart

May be send an email to have your work routine.
Mail Settings (To / Cc / Bcc / Return / Subject) etc.

This extension is by creating a simple formatting, you can complete the address written in two steps

Rated 4 out of 5 stars (2)
1,320 users

MarkSubfolders New Requires Restart

Mark all read for Subfolders

It's the same like MarkSubfolders but it's compatible with Firefox 4 and later.

Rated 5 out of 5 stars (5)
1,192 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)
1,316 users

Yet Another Remove It Permanently Requires Restart

Remove elements and block content on Web pages.

Rated 4 out of 5 stars (47)
2,636 users

Check Domain Requires Restart

This extension is to display the warning dialog when you send mail for multiple domains.

Rated 4 out of 5 stars (5)
3,180 users

Flex Confirm Mail Requires Restart

Confirm mail address and attachments based on flexible rules.

Rated 1 out of 5 stars (1)
11,582 users

Confirm-Address Requires Restart

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (43)
53,203 users

confirm-mail Requires Restart

メール送信前に宛先メールアドレスと添付ファイル名を確認することができるアドオンです。

Rated 3 out of 5 stars (5)
2,347 users

Address Close Button Requires Restart

Adds a Address Close Button to mail compose window.

Rated 5 out of 5 stars (25)
14,120 users

P7MON Requires Restart

Abilita la gestione alternativa degli allegati P7M

Rated 2 out of 5 stars (1)
3,700 users

Join-NG Requires Restart

Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".

Rated 5 out of 5 stars (4)
2,809 users

Check and Send Requires Restart

Check the message contents and addresses before you send the message...

Rated 4 out of 5 stars (31)
22,463 users

ThunderPEC Requires Restart

ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.

Rated 4 out of 5 stars (12)
19,955 users

ThunderKeepPlus

Google Keep for Thunderbird

Rated 5 out of 5 stars (6)
1,640 users

GPO support For Firefox and Thunderbird

Firefox and Thunderbird extension to manage user preferences and user profile CA certificates using group policy

Rated 4 out of 5 stars (12)
27,289 users