Extensions by Name

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.vcs Support

Import and export calendar files in vCalendar (.vcs) format

Rated 3 out of 5 stars (18)
9,325 users

3e Calendar

Adds support for 3e calendars

Rated 1 out of 5 stars (1)
589 users

A Better S/MIME GUI

Provides a better S/MIME GUI for Thunderbird.

Rated 3 out of 5 stars (2)
6 users

abcTajpu

Type in accented letters, international characters or symbols into Firefox or Thunderbird, either simply by using a context menu (there being support for many languages), or quickly by keyboard macro (you can even define your own).

Rated 4 out of 5 stars (69)
3,575 users

About Add-ons

Adds an About button to extensions, themes, and languages in the Add-ons list.

Rated 4 out of 5 stars (9)
952 users

About Startup No Restart

Displays startup timings

Rated 4 out of 5 stars (15)
960 users

About:about Button No Restart

A button that lists all the about pages that exist. Some of these pages are also provided as separate buttons.

Rated 5 out of 5 stars (1)
146 users

about:config Button No Restart

Open about:config to change hidden settings that cannot be edited from the Options window. All Mozilla based programs have settings that can not be changed in the options window.

Not yet rated
367 users

about:kittens

Baby cats and kittens in the about box...

Rated 5 out of 5 stars (6)
40 users

about:support

A Mozilla Messaging addon to assist in product support.

Rated 4 out of 5 stars (5)
33 users

AboutConfig

about:config for...

Rated 3 out of 5 stars (13)
1,066 users

abusix Spam reporter

The abusix Spam Reporter enables you to forward and report spam to the abusix blackhole.mx systems directly from Thunderbird (free of charge). Thus, you help professionals and security vendors to fight spam much more effectively at the source.

Rated 4 out of 5 stars (7)
576 users

Account Colors

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 (89)
10,396 users

Account Manager Toolbar Button

This is a small devision of Toolbar Buttons https://addons.mozilla.org/firefox/2377/ or
http://codefisher.org/toolbar_button/

Not yet rated
32 users

accountex

Export/Import Account Settings.....

Rated 2 out of 5 stars (28)
6,478 users

Adblock Edge No Restart

Adblock Edge is a fork of the Adblock Plus version 2.1.2 extension for blocking advertisements on the web, without sponsored ads whitelist.

**This addon has been discontinued**

Rated 5 out of 5 stars (278)
734,736 users

Adblock Plus No Restart Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,915)
20,301,105 users

Add Birthdays To Calendar

Birthdays from addressbook-contacts will be added as events to Lightning...

Rated 3 out of 5 stars (22)
163 users

Add Signature

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

Rated 3 out of 5 stars (34)
7,998 users

Add-on Preferences Button No Restart

Displays a menu that allows you to open the option/preference window for any add-on that has one.

Rated 4 out of 5 stars (1)
187 users