My Favorite Add-ons

by Hellebaard

24 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,800 reviews

21,576,512 users

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).

Lightning by Mozilla Calendar Project

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.

YouTube by ditman

Rated 5 out of 5 stars 101 reviews

19,881 weekly downloads

This add-on will add an improved version of YouTube's search engine, now with search suggestions!

Thanks all who voted for helping this add-on to become public! Please keep leaving feedback!

Enigmail by Patrick Brunschwig

Rated 4 out of 5 stars 188 reviews

169,480 users

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

DuckDuckGo (HTTPS / SSL) by DuckDuckGo

Rated 5 out of 5 stars 70 reviews

4,864 weekly downloads

DuckDuckGo is the search engine that doesn't track you. We also have smarter answers and less clutter. This extension adds DuckDuckGo (HTTPS / SSL version) to the search bar. For more features, see the DuckDuckGo Plus add-on. Enjoy!

ChatZilla by Gijs Kruitbosch, Robert Ginda, others

Rated 4 out of 5 stars 126 reviews

140,147 users

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

TinEye Reverse Image Search by TinEye

Rated 4 out of 5 stars 184 reviews

115,445 users

TinEye is a reverse image search engine. The plugin adds a context menu item that allows you to search for an image to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 87 reviews

177,349 users

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Woordenboek Nederlands by fjoerfoks

Rated 3 out of 5 stars 55 reviews

82,358 users

Dutch dictionary with wordslist from OpenTaal.

Form History Control by Stephan Mahieu

Rated 5 out of 5 stars 81 reviews

26,331 users

Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller.

Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.

Control for which webpage form history is saved or not.

LanguageToolFx – Style and Grammar Checker by Gulp21

Rated 5 out of 5 stars 7 reviews

13,269 users

Check selected text on websites or text in text fields with the free style and grammar checker LanguageTool.

Duplicate Contact Manager by Marian Steinbach, Copelnug

Rated 3 out of 5 stars 100 reviews

23,953 users

Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.

LightningButton by rsjtdrjgfuzkfg

Rated 5 out of 5 stars 14 reviews

20,916 users

Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.

Duck Duck Go (SSL) by SSL Search Bar

Rated 5 out of 5 stars 6 reviews

273 weekly downloads

Duck Duck Go is a search engine that does not collect or share personally identifiable information. This search bar add-on utilizes SSL to protect searches between You and Duck Duck Go.

ThunderBirthDay by ingomueller.net

Rated 4 out of 5 stars 84 reviews

21,602 users

Display birthdays from the Thunderbird addressbooks as events in Lightning.
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