Extensions by Name

Subscribe

StockTicker

Shows your favorite stocks in a customizable...

Rated 3 out of 5 stars (80)
304 users

StormCows

Allows two-way access between Remember The Milk and calendar events or todo items.

Rated 4 out of 5 stars (9)
580 users

Stylish

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.

Rated 4 out of 5 stars (598)
704,423 users

Stylish Tools

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 4 out of 5 stars (1)
736 users

Stylish-Custom

abandoned, use Stylish Custom Add-on instead
http://forum.userstyles.org/discussion/37939/stylish-custom-add-on/p1

custom additions to Stylish extension.
brings back features from 0.5.9 and adds new features

Rated 4 out of 5 stars (35)
3,998 users

Subject Cleaner

Remove extra strings from the subject while composing the message.

Not yet rated
467 users

Subject Manager

Manages subject of composed emails.

Rated 5 out of 5 stars (8)
2,121 users

Submit Word (Romanian)

An extention that allows users to submit words for inclusion in the Romanian dictionary.

Rated 5 out of 5 stars (3)
38 users

SubSwitch

Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.

Rated 4 out of 5 stars (6)
1,332 users

SugarCRM/SuiteCRM Pro Thunderbird Integration

SugarCRM v6.2+/SuiteCRM Integration for Thunderbird v5+.

Enables archiving of emails into SugarCRM v6.2+ and SuiteCRM (all versions) from Thunderbird. Requires a purchased license key (you can request a trial from within the extension).

Not yet rated
465 users

Sun Cult

Worldwide Sunrise, Sunset, Twilight, Moonrise and Moonset...

Rated 5 out of 5 stars (102)
5,647 users

SUNBIRD Button-**32** bit version-for Firefox 4.* and Thunderbird 3.*

A button to call up the Sunbird Calendar from Firefox and Thunderbird toolbars. This version for 32-bit operating system!

Not yet rated
72 users

SUNBIRD Calendar button- **64 bit** version for Firefox 4.* and Thunderbird 3.*

A button to call up the Sunbird Calendar from Firefox and Thunderbird toolbars . 64 BIT operating system version!

Not yet rated
83 users

Super Date Format

Fully customize the date format of the Date/Received column.

Rated 4 out of 5 stars (7)
2,152 users

SuperOffice Mail Link

Archive mail in SuperOffice CRM software from Thunderbird

Not yet rated
57 users

Switch Message Colour

Adds a Toolbar-Button to Thunderbird to switch between the mails' original colouring and your user defined colouring.

Not yet rated
167 users

Sync On Arrival

Downloads new message headers (and bodies, if configured) immediately when Thunderbird detects new messages in an IMAP folder - that's more or less what the "download_on_biff" preference promises to do, but somehow fails to deliver...

Rated 4 out of 5 stars (18)
306 users

SyncKolab

SyncKolab can synchronize your calendar, address book and tasks against an IMAP server in Kolab formats version 1 (vCard/iCal) or version 2 (XML) or turn your Thunderbird/Lightning into a native Kolab Client (http://kolab.org).

Rated 3 out of 5 stars (70)
7,854 users

SyncMab

This extensions can import and export mozilla address books at startup and exit of Thunderbird. You can first save a mab at a specific location e.g. on a network or the internet (Version 2.0) and then let it be updated every time TB starts up or...

Rated 3 out of 5 stars (21)
1,213 users

System Monitor

Provides CPU usage and memory usage graphs on the toolbar.

Rated 4 out of 5 stars (11)
1,334 users