Up & Coming Extensions

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MailHops Requires Restart

MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.

Rated 4 out of 5 stars (28)
3,692 users

新同文堂 (New Tong Wen Tang) Requires Restart

NewTongWenTang is a tool to switch display Chinese content between traditional and simplified glyphs (中文繁簡體互轉工具)

Rated 4 out of 5 stars (98)
33,199 users

KeePass Helper Requires Restart

Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.

Rated 4 out of 5 stars (35)
4,812 users

Sun Cult Requires Restart

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

Rated 5 out of 5 stars (117)
4,105 users

ViewAbout Requires Restart

Enables access to various about: dialogs from the View menu.

Rated 4 out of 5 stars (17)
3,400 users

Add Signature Requires Restart

Simply add your signature manually (right mouse click) to your emails

Rated 3 out of 5 stars (36)
8,499 users

Copy As Plain Text Requires Restart

Removes formatting from copied text.

Rated 4 out of 5 stars (59)
19,352 users

Disable "You" Requires Restart

Addresses in the From/To/Cc headings are since Thunderbird 3 replaced with word "You" if they match any of your identities. This extension disables this function.

Rated 4 out of 5 stars (18)
2,337 users

Tag Toolbar Requires Restart

Add toolbar for toggling tags.

Rated 4 out of 5 stars (47)
17,554 users

Blinking Alert Requires Restart

Adds blink feature to the new-mail alert.
You can also disable auto-hiding of the alert.

Rated 4 out of 5 stars (27)
12,943 users

UnMHT

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 4 out of 5 stars (229)
93,877 users

Text Link Requires Restart

Allows URI texts written in webpages to be loaded by double clicks.

Rated 4 out of 5 stars (299)
124,700 users

Babylon Dictionary Word Search Requires Restart

Find the definition for a selected word in a web page or an email.
Right click over the selected word, choose the option "Search in Babylon" and that's it! You will have a new window with the definition of the selected word.

Rated 4 out of 5 stars (45)
3,902 users

Account Colors Requires Restart

Associates user-defined colors with accounts and identities. Applies these colors to accounts, identities, folders, message list, message headers and compose headers. Users will always know which accounts/identities they are working with.

Rated 4 out of 5 stars (94)
12,528 users

Folder Account Requires Restart

Lets you associate user accounts and identities with specific folders. Great for multiple users who share TB, or for managing mailing lists.

Rated 4 out of 5 stars (53)
3,080 users

SmilieInserter Plus Requires Restart

Insert smilies in messages.

Rated 5 out of 5 stars (18)
3,534 users

Hide Local Folders Requires Restart

Removes the "Local Folders" entry from the folder pane.

Rated 4 out of 5 stars (19)
8,897 users

SmartSave Thunderbird Extension Requires Restart

Now you can export your messages in a smarter way! You can export all folders and subfolder esaily from your local folder or from your IMAP...

Rated 3 out of 5 stars (108)
2,373 users

EmailPicky 4 Requires Restart

Grab email addresses from emails from any selected Email Folder and add them to your contacts. (Email Crawler / Email ID Grabber / Bounced email collector) - Thunderbird Plugin
Note: It doesn't create duplicates, but shows as 'xxx messages added'.

Rated 3 out of 5 stars (12)
4,699 users

Console² Requires Restart

Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.

Rated 5 out of 5 stars (49)
6,848 users