Extensions by Name

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Addressbooks Synchronizer Requires Restart

Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers

Rated 4 out of 5 stars (58)
33,921 users

AddressBookTab Requires Restart

It adds a button that can be put in toolbars and that open the addressbook in a new tab

Rated 4 out of 5 stars (67)
18,293 users

addressContext Requires Restart

An extension to add addressbook-related options to the context...

Rated 4 out of 5 stars (50)
1,731 users

AddressLabel Requires Restart

Create address labels from selected contacts in pdf, odt, ps or html.

Usage
1) Verify settings
2) In the Address Book, select contacts and right click

Rated 5 out of 5 stars (1)
303 users

AddTo Miru Directory Server Requires Restart

The AddTo extension allows Thunderbird users to add contact cards direct to a shared miru directory server. Once added contact details are available via LDAP for auto-complete and address book search...

Rated 4 out of 5 stars (3)
7 users

Adhiyan Requires Restart

Adhiyan is a tool to convert and view TSCII/TUNE/TAB/TAM/DailyThanthi/Dinamani/Chenet/Kambar encoded Tamil content to UNICODE Tamil.

Rated 5 out of 5 stars (3)
52 users

AdNauseam

Fight back against advertising surveillance

Rated 4 out of 5 stars (6)
5,043 users

AdSidebar

Live in harmony with ads.

AdSidebar is an alternative to traditional ad blocker extensions that benefits both the user and content creators. Ads are displayed in a sidebar on the right side of the screen.

Not yet rated
16 users

Advanced Unread Folders Requires Restart

Adds a folder view showing unread folders, including their hierarchy. This is helpful if you have a lot of folders to make sure you don't miss an email, or if you are not happy with the existing unread folders view.

Rated 4 out of 5 stars (10)
1,545 users

AFP protocol enabler

Enable afp protocol (afp://)

Not yet rated
19 users

After Unsent Mail Is Sent Requires Restart

Run a program of your choice after unsent mail has been sent.

Rated 5 out of 5 stars (1)
55 users

AlertSwitch Requires Restart

Turn on/off the alert shown when new message arrives.

Rated 4 out of 5 stars (3)
816 users

AlexPro for Thunderbird Requires Restart

AlexPro add-on per ThunderBird è un componente per l'archiviazione dei messaggi ricevuto o inviati nelle Pratiche AlexPro.

Not yet rated
23 users

All mail from all accounts Requires Restart

Add a toolbar button to send and receive all mail from all accounts for Leopard theme.

Rated 5 out of 5 stars (1)
427 users

All Menus Button

Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.

Rated 5 out of 5 stars (6)
2,290 users

ALL To CC BCC Requires Restart

送信先アドレスのすべてをTo、CC、BCCに変更するボタンです。
メール作成画面の、件名の下に追加されます。

Rated 4 out of 5 stars (1)
749 users

Allow Empty Subject Requires Restart

Allows Thunderbird to send message without a subject.

Visit my Allow Empty Subject site for recent versions and news.

Rated 4 out of 5 stars (21)
858 users

Allow HTML Temp Requires Restart

This Add-on allows to have HTML temporarily allowed in the currently displayed message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (if this is your default mode).

Rated 4 out of 5 stars (59)
11,167 users

Allow Local Addresses Requires Restart

Allows Thunderbird to send to addresses without a domain, for corporate / intranet use...

Rated 4 out of 5 stars (6)
753 users

Alphanumerator Requires Restart

Convert alphanumeric phone numbers to just numbers. Simply highlight the text, right-click it, and click "Alphanumerate". For example, 1-800-PICK-UPS would be converted to...

Rated 5 out of 5 stars (2)
42 users