Up & Coming Extensions

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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)
9,110 users

Rebrand Requires Restart

This wizard creates an XPI that rebrands Firefox, SeaMonkey or Thunderbird. You can change the brand name as well as the brand images and icons.

Rated 4 out of 5 stars (13)
7,097 users

Simple Locale Switcher Requires Restart

An easier management of the user interface language

Rated 5 out of 5 stars (11)
32,964 users

Quick Locale Switcher 2 Requires Restart

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

Rated 5 out of 5 stars (1)
2,079 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)
5,635 users

LookOut (fix version) Requires Restart

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

Rated 4 out of 5 stars (11)
29,289 users

InfoNotary Configurator for Mozilla Requires Restart

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 5 out of 5 stars (2)
8,911 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 (183)
118,414 users

Finnish spellchecker Requires Restart

Finnish open source Voikko-spellchecker for Mozilla and needed libraries.

Rated 4 out of 5 stars (101)
8,447 users

Awesome ldapInfoShow

Show contact photo and other info from Local Dir, Addressbook, LDAP, Facebook, LinkedIn, Flickr, Gravatar etc

Rated 4 out of 5 stars (9)
2,059 users

Addressbooks Synchronizer Requires Restart

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

Rated 4 out of 5 stars (58)
41,491 users

Remote XUL Manager

Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.

Rated 5 out of 5 stars (37)
82,230 users

LookOut Requires Restart

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

Rated 4 out of 5 stars (151)
226,220 users

Lucifox Requires Restart

Read EPUB e-books and browse OPDS catalogs.

Rated 4 out of 5 stars (24)
137,728 users

Join-NG Requires Restart

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

Rated 5 out of 5 stars (4)
2,978 users

Lightning Nightly Updater (Unofficial) Requires Restart

Quickly get to the latest nightly build of Lightning relevant to the version of Thunderbird and the OS you're on.

Rated 4 out of 5 stars (39)
11,128 users

Google Keep Notes

Google Keep Notes brings Google Keep right into your Firefox Sidebar.

Rated 4 out of 5 stars (7)
3,614 users

Mail Redirect Requires Restart

Allow to redirect (a.k.a. "remail") mail messages to other recipients.

Rated 4 out of 5 stars (131)
42,749 users

Dictionary Switcher Requires Restart

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (171)
19,383 users

Export for Thunderbird & Lightning Launcher Requires Restart

Export for Thunderbird & Lightning is the worldwide unique printing and exporting solution for Mozilla Thunderbird and Lightning for Windows.
Multi lingual user interface: English, German, French and Spanish

Rated 2 out of 5 stars (9)
1,214 users