Top-Rated Extensions

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Get Selected Mails

Gets new messages for selected mail accounts.

Rated 5 out of 5 stars (7)
828 users

Open Long Url

Adds an option to your File menu to allow you to open long, multi-line...

Rated 5 out of 5 stars (7)
181 users

Pan No Restart

Block ads and manage proxy.

Rated 5 out of 5 stars (48)
2,018 users

DOM Inspector

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Rated 5 out of 5 stars (61)
139,450 users

Subject Manager

Manages subject of composed emails.

Rated 5 out of 5 stars (11)
2,273 users

Header Tools Lite

Allows to modify the header and the source of messages

Rated 5 out of 5 stars (21)
4,514 users

THUNDER!Box

Thunder!Box allows transferring contacts from your Thunderbird-Addressbook to the phonebook of a connected AVM FRITZ!Box FON router and back. You may also use your addressbook to initiate calls.

Rated 5 out of 5 stars (24)
1,953 users

CompactHeader Featured

Add symbol in header plane to switch between compact and expanded view. Options to switch between one or two lines compact view, which buttons should be displayed in header pane. For Thunderbird 36 and older use version 2.0.9 (see version history)

Rated 5 out of 5 stars (167)
150,914 users

Extension Options Menu

Adds extension options dialogs to the Tools or Titlebar menu and includes toolbar icon.

Rated 5 out of 5 stars (59)
5,694 users

QuickPasswords

Retrieve your Passwords the quick way! Never retype or display your secure passwords on screen anymore - put the password where you need it - the login form or the clipboard.

Now also includes single sign on change!

Rated 5 out of 5 stars (44)
7,924 users

TrayHotKey

为Fx5.0 及以上版本提供系统热键(老板键)功能

Rated 5 out of 5 stars (46)
3,718 users

SelectionSK

Pops up user menu with useful tools (copy, highlight, translation, search, etc.) when text is selected with the mouse

Rated 5 out of 5 stars (63)
1,526 users

Mail Merge Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (133)
47,200 users

Update Notifier

Note from Mozilla: This add-on has been discontinued. Try Add-on Update Checker instead.

Notifies you when updates are available for your extensions and themes.

Rated 5 out of 5 stars (180)
13,104 users

More Tools Menu

Unclutter the "Tools" menu by moving new items to a "More Tools" menu.

Rated 5 out of 5 stars (35)
9,481 users

Personas Rotator

Personas Rotator is a new companion for Personas Firefox add-on to change over 65000+ skins periodically on Firefox. What Will Your Browser Wear Now?

Rated 5 out of 5 stars (77)
10,952 users

中止ボタンがしいたけに見えて困る

Huh, you said the stop button looks like shiitake? No way, you must be tired.

Rated 5 out of 5 stars (21)
1,044 users

UnMHT No Restart

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 5 out of 5 stars (202)
87,639 users

No Message Pane Sort by Mouse

No Message Pane Sort prevents accidental resorting of the message pane by disabling mouse button clicks on the column headers.

It is still possible to sort messages by ctrl-clicking the header.

Rated 5 out of 5 stars (18)
1,469 users

IranZilla

IranZilla provides the following services in Thunderbird:

* Adds a column in the mail view for displaying Iranian dates for each email.
* Supports both English and Persian Iranian month names.
* Adds a context menu item for copying the Iranian dates...

Rated 5 out of 5 stars (18)
218 users