Top-Rated Extensions

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Rise of the Tools

Moves the toolbar back above the tabbar.

Rated 5 out of 5 stars (66)
287 users

ConQuery Requires Restart

Context searching for everyone and URL manipulation tool for advanced users...

Rated 5 out of 5 stars (36)
2 users

MinimizeToTray For FF 3.5 Requires Restart

MinimizeToTray For firefox 3.Minimizes Mozilla windows into the system tray.Note:I am going to remove this extension if the original creator make a FF 3 version!

Rated 5 out of 5 stars (122)
0 users

Nagios Checker Requires Restart

The statusbar indicator of the events from the network monitoring system Nagios.

Rated 5 out of 5 stars (69)
0 users

Header Tools Improved

Allows to modify headers and source of messages

Rated 5 out of 5 stars (37)
2,597 users

Addons Manager Hilite

Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.

Rated 5 out of 5 stars (19)
1 user

Thunderbird Todoist

Extension to add emails as tasks to Todoist.

Rated 5 out of 5 stars (10)
1,229 users

Folder Filters Button Requires Restart

Just a very simple add-on that adds a toolbar button to execute the "Run Filters on Folders" from Tools menu.

Rated 5 out of 5 stars (36)
527 users

QuickNote Requires Restart

A simple note-taking extension.

Rated 5 out of 5 stars (204)
52 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 (47)
6 users

AddressLabel Requires Restart

Create address labels from selected contacts in pdf, odt, ps or html.

Usage
1) Chose settings.
2) In the Address Book, select contacts and right click.
3) Print with "Actual Size" (not "Fit to Page").

Rated 5 out of 5 stars (4)
0 users

quicker quicksearch

make searching for emails faster:

Automatically insert into the quickfilter box: the author, subject or the email domain of the selected email.


No need to retype the address, if you want to search for all emails of this author.

Rated 5 out of 5 stars (7)
1,225 users

External Editor Revived

Edit emails in external editors such as Vim, Neovim, Emacs, etc.

Rated 5 out of 5 stars (7)
354 users

Single Domain

Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.

Rated 5 out of 5 stars (4)
97 users

Received

Displays the "Received" header parsed with a regular expression.

Rated 5 out of 5 stars (4)
162 users

X-Unsent support

Adds support for the X-Unsent header.

Rated 5 out of 5 stars (4)
67 users

10ten Japanese Reader (Rikaichamp)

Look up Japanese words with the hover of a mouse.

After enabling the add-on from the toolbar (or press Alt+R) simply hover over Japanese text and a popup displays corresponding dictionary definitions.

Rated 5 out of 5 stars (4)
223 users

Smileyfixer

Fixes smileys that show in emails created by Outlook as J.

Rated 5 out of 5 stars (4)
960 users

Telegram Web in Thunderbird

Open Telegram Web in Thunderbird

Rated 5 out of 5 stars (5)
765 users

FileLink for Plik

Plik no longer offers uploads without an account. So the add-in currently only works for self-hosted instances of the software. Currently I cannot promise a date for a fix. Sorry.

Rated 5 out of 5 stars (4)
3,621 users