Up & Coming Extensions

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SmartTemplate4

SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.

Rated 5 out of 5 stars (49)
20,284 users

GProxy Plus

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

Not yet rated
1,297 users

Addressbooks Synchronizer

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

Rated 4 out of 5 stars (57)
36,238 users

Tag Toolbar

Add toolbar for toggling tags.

Rated 4 out of 5 stars (45)
17,516 users

Quote Colors

Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.

Rated 4 out of 5 stars (43)
14,916 users

Clippings

Save frequently-entered text for pasting later.

Rated 4 out of 5 stars (180)
44,422 users

Asterisk Click2Dial

This is an easy to use extention, select any number on a web page, right click to open the context menu which you can use to call this number.
Want it in your language, help us : https://translations.launchpad.net/click2dial-firefox-extension

Rated 5 out of 5 stars (5)
1,624 users

LookOut+

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 5 out of 5 stars (4)
1,978 users

Telify

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 4 out of 5 stars (56)
12,246 users

XNote++

Persistent sticky notes for Thunderbird associated to mails.
This is a port to Thunderbird >= 3 based on XNote 2.1.0 ( https://addons.mozilla.org/en-US/thunderbird/addon/3093 ) with bugfixes and additional features.

Rated 5 out of 5 stars (66)
21,403 users

Sender Name

Rated 4 out of 5 stars (40)
2,576 users

German Spell Check

Important!!! If you can't see the German flag, please click: View --> Toolbars --> Bookmarks Toolbar. This is a German spelling checker for finding misspellings.

Rated 3 out of 5 stars (7)
5,169 users

Color Folders

Color your Folder Treeview Icons!

Rated 4 out of 5 stars (136)
29,214 users

RedirectFilter

Redirect action in the filters.

Rated 4 out of 5 stars (15)
2,617 users

Disable DragAndDrop (Thunderbird)

A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.

Rated 5 out of 5 stars (9)
2,059 users

Hide Local Folders

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

Rated 4 out of 5 stars (19)
7,955 users

XNote

Persistent sticky notes for Thunderbird associated to mails...

Rated 4 out of 5 stars (90)
1,634 users

Search as list

Search results appear as list (as per the "Open email as list" button).
- return to facet view with shift+close [x]
- auto open list view when few results found
- column config./sort/toggle [IMG3&4]
- apply columns to search as list menu [IMG5]

Rated 5 out of 5 stars (22)
1,912 users

Subject Manager

Manages subject of composed emails.

Rated 5 out of 5 stars (13)
2,546 users

Email signature for Thunderbird - WiseStamp

Switch Thunderbird email signatures. Supports Gmail, Yahoo, AOL & Outlook webmails. Youtube, Facebook, Twitter icons & more

Rated 4 out of 5 stars (2)
4,228 users