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Display Mail User Agent

Displays icon for user agent of received mails.

Rated 4 out of 5 stars (103)
35,002 users

ThunderBrowse Featured

Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!

Rated 3 out of 5 stars (149)
28,587 users

FoxyProxy Basic

FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.

Rated 4 out of 5 stars (30)
26,410 users

Notepad (QuickFox)

Everyday note-taking solution.

Rated 4 out of 5 stars (178)
24,790 users

QuickFolders (Tabbed Folders)

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Rated 5 out of 5 stars (109)
23,720 users

FireTray

A system tray extension for Linux and Windows, allowing to set up custom icon, hiding to tray instead of closing, display the number of unread messages in mailing applications, and other features ...

Rated 4 out of 5 stars (224)
23,091 users

XNote++

Persistent sticky notes for Thunderbird associated to mails.
This is a port to Thunderbird >= 3 and Seamonkey >= 2 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 (63)
18,925 users

Open With

Quickly test out your web pages in Internet Explorer, Chrome, Safari, or Opera. Open With opens the current page in your other browsers with just one click. Add Open With to your menus, toolbars and developer toolbox today!

Rated 4 out of 5 stars (172)
18,403 users

Mailbox Alert

Mailbox Alert allows you to specify, for each seperate mail folder, a message, sound and/or a system command that will be executed when new mail is found there. ...

Rated 4 out of 5 stars (103)
17,888 users

Bamboo Feed Reader

Feed reader | RSS - ATOM - OPML

Rated 4 out of 5 stars (233)
15,938 users

ExQuilla for Microsoft Exchange

Thunderbird email accounts, including contacts, connecting to Microsoft Exchange Web Services.

Rated 3 out of 5 stars (80)
15,646 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 (42)
14,733 users

MagicSLR

MagicSLR extends functions and buttons to get and send messages. Many users missed a combined "Get/Send" button in Thunderbird. MagicSLR provides this button and more.

Rated 4 out of 5 stars (40)
11,668 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 (51)
11,386 users

ThunderPEC

ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) in Thunderbird.

Rated 4 out of 5 stars (6)
11,215 users

Allow HTML Temp

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 (56)
10,971 users

DictionarySearch (Official Version)

Looks up a user selected word in an online...

Rated 4 out of 5 stars (114)
10,809 users

Google Search for Thunderbird

Adds Google Search to Thunderbird

Rated 4 out of 5 stars (10)
10,526 users

QuoteCollapse

Collapse and expand quotes. Please see the extension homepage for...

Rated 4 out of 5 stars (26)
10,340 users

ConfigDate

ConfigDate allows to configure the "Date" column in message threadpane. When displaying the message header, it is possible to display the (default) formated date or the senders local sent time (Date-String).

Rated 3 out of 5 stars (23)
10,290 users