Up & Coming Extensions

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Lightweight Themes Manager No Restart

Manage your installed personas (lightweight themes).

Rated 5 out of 5 stars (8)
13,117 users

Print Preview Button and Keyboard Shortcut

Adds a "Print Preview" button to the customize toolbar in Firefox.
Binds the Ctrl+Alt-Shift+P keyboard shortcut to Print Preview.

Rated 5 out of 5 stars (3)
2,819 users

Flex Confirm Mail

Confirm mail address and attachments based on flexible rules.

Rated 1 out of 5 stars (1)
7,261 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 (221)
95,004 users

Sender Verification Anti-Phishing Extension

Protects you from phishing attacks by verifying the From: address domain name of emails as you read them. Sender Policy Framework (SPF) and DNS-based reputation lists are used.

Rated 4 out of 5 stars (20)
1,018 users

Awesome Auto Archive No Restart

Automatically do Archive/Copy/Delete/Move actions based on user defined rules

Rated 4 out of 5 stars (20)
6,394 users

Simple Timer

A timer/clock residing in the toolbar.

Rated 5 out of 5 stars (107)
12,940 users

Compact Menu 2

Add a compact menu button to the navigation toolbar, and hide the menu bar.

Rated 4 out of 5 stars (350)
7,839 users

Dcurrency

Currency exchange rates in the status bar (data from Yahoo!Finance or Google on option).
Display currency graphs.

Rated 4 out of 5 stars (130)
2,529 users

Enigmail Featured

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

Rated 4 out of 5 stars (183)
167,968 users

Element Hiding Helper for Adblock Plus No Restart

Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

Rated 5 out of 5 stars (461)
733,009 users

Filter Button

Allows to add a button to the message header view toolbar that shows all filters that match the selected message, including manual and disabled filters. A click on the button allows to select a filter to run.

Rated 4 out of 5 stars (6)
1,501 users

Show Address Only

Adds columns to display Sender/Recipients mailaddress only.

Rated 4 out of 5 stars (23)
3,026 users

SearchIMDB

Search the highlighted text at IMDB.

Rated 3 out of 5 stars (8)
5,500 users

Slim Add-ons Manager No Restart

The Add-ons Manager slims down!
This add-on reduces the height of entries in the Add-on Manager, so you can display more of them at a time.

Rated 5 out of 5 stars (47)
10,323 users

Show Password On Input

Gives an option to show the master password on input

Rated 4 out of 5 stars (11)
1,066 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 SSO change (multi-domain pw) and Backup + Restore.

Rated 5 out of 5 stars (47)
6,963 users

Auto Resize Image

Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).

Rated 4 out of 5 stars (24)
14,138 users

Display Quota

This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit...

Rated 4 out of 5 stars (30)
40,768 users

www.Translate

Multi-Translator from Google, Bing and Pragma.
Translation tool for your Firefox and Thunderbird with a simple and friendly interface.

Rated 4 out of 5 stars (29)
13,463 users