Up & Coming Extensions

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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)
38,245 users

Quicktext Requires Restart

Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.

Rated 4 out of 5 stars (299)
98,506 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)
2,593 users

NewScrollbars (aka NoiaScrollbars) Requires Restart

The "NewScrollbars"-extension replaces default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes".

Rated 5 out of 5 stars (99)
14,423 users

Contacts Sidebar Requires Restart

Displays the address books in a sidebar in Thunderbirds 3-pane-window and can be toggled with the F4 key or a toolbar button.

Visit my Contacts Sidebar site for recent versions and news.

Rated 4 out of 5 stars (242)
11,350 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)
211,240 users

Forward Requires Restart

Add Inline / As Attachment option to Forward button and Message context menu.

Rated 4 out of 5 stars (23)
4,252 users

ReplyWithHeader Requires Restart

Outlook style headers and few goodies for Thunderbird & Postbox.

Rated 5 out of 5 stars (11)
1,585 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)
1,061 users

LookOut+ Requires Restart

LookOut is a plugin which allows to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).

This version is a fix for Seamonkey 2.*.

Rated 4 out of 5 stars (5)
3,475 users

Show Address Only Requires Restart

Adds columns to display Sender/Recipients mailaddress only.

Rated 4 out of 5 stars (28)
4,038 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)
2,792 users

Tag Toolbar Requires Restart

Add toolbar for toggling tags.

Rated 4 out of 5 stars (55)
15,741 users

Telify Requires Restart

Converts telephone numbers into clickable links for use with CTI applications, SIP clients, Skype, Netmeeting, snom phones, the AGFEO TK-Suite Client and SerVonic IXI-PCS.

Rated 3 out of 5 stars (57)
8,388 users

Tag Sequence Arranger Requires Restart

Enable you to arrange the tag sequences in their listbox.

Rated 5 out of 5 stars (6)
3,259 users

Signature /Auto Paste /Prefill Fourms Requires Restart

Makes everyday entries to forms & forums simpler!
Add a sig. with just a Rclick of the mouse and select 'Add Sig.' from the context menu.
(Please, note: What you see in the pic is only an example. ThoseRMine Sorry, you have to make your own tabs. )

Rated 4 out of 5 stars (25)
4,207 users

Sender Name Requires Restart

Rated 4 out of 5 stars (37)
1,805 users

PrintingTools Requires Restart

Adds some options to print messages and addressbooks

Rated 5 out of 5 stars (24)
37,403 users

CardBook Requires Restart Featured

A new Thunderbird address book based on the CardDAV and vCard standards.

Twitter: @CardBookAddon
Forum: https://cardbook.6660.eu/

Rated 4 out of 5 stars (129)
23,588 users

Hide Local Folders Requires Restart

Removes the "Local Folders" entry from the folder pane.

Rated 4 out of 5 stars (22)
9,563 users