Up & Coming Extensions

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Theme Font & Size Changer for ThunderBird

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 3 out of 5 stars (50)
7,135 users

OBM Connector Requires Restart

OBM Lightning Calendar and addressbooks connector

Not yet rated
1,141 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 (4)
2,547 users

AddressBook in Tab Requires Restart

Adds a button that can be put in toolbars which opens the addressbook in a new tab like pastismans AddressBookTab

Rated 5 out of 5 stars (4)
6,961 users

Report Spam Requires Restart

Report spam is a Thunderbird plugging to report antispam errors. A new button is added to header tool bar in order to signal a message as a false positive (a ham that is tagged as spam) or a false negative (a spam not tagged as spam).

Rated 3 out of 5 stars (11)
2,116 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)
1,018 users

CALDAV - Search/Subscribe Requires Restart

Add CalDAV search & subscribe feature to Lightning

Rated 3 out of 5 stars (13)
2,408 users

Menu Wizard Requires Restart

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (231)
83,021 users

P7MON Requires Restart

Abilita la gestione alternativa degli allegati P7M

Not yet rated
4,110 users

ThunderPEC Requires Restart

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

Rated 5 out of 5 stars (11)
20,237 users

Quick Locale Switcher Requires Restart

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 3 out of 5 stars (87)
176,064 users

GPO support For Firefox and Thunderbird

For work with new versions, use autoconfiguration module https://mozillagpo.sourceforge.io/
Firefox and Thunderbird extension to manage user preferences and user profile CA certificates using group policy

Rated 4 out of 5 stars (12)
26,871 users

Confirm-Address Requires Restart

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (50)
23,060 users

Display Quota Requires Restart

This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit...

Rated 4 out of 5 stars (30)
32,459 users

Imap-ACL-Extension Requires Restart

Extension to manage acls/permissions for shared mailboxes/folders on imap servers.

Rated 4 out of 5 stars (9)
2,377 users

Copy Pure Text Requires Restart

Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.

Rated 4 out of 5 stars (15)
3,510 users

South African English spell checker Requires Restart

The South African English spell checker allows you to use place names, borrowed words, and other expressions that are unique to South Africa.

"No more eina, just a lekker spell checker!"

Rated 5 out of 5 stars (3)
1,220 users

Address bulk copy (アドレス一括コピー) Requires Restart

Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
それを実現するためのアドオンです。

Rated 5 out of 5 stars (2)
1,601 users

List Addons in Windows' Programs

List addons in Windows' "Add or Remove Programs".

Not yet rated
1,784 users

Secure Addressing Requires Restart

This add-on provides features to avoid sending emails to wrong addresses. Key features are a confirmation window of recipient's addresses upon sending, name and affiliation look up at mail composition and main windows, and safe auto completion.

Rated 5 out of 5 stars (19)
2,775 users