Best of 2 Billion Firefox Add-ons

by Mozilla

19 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,973 reviews

21,164,866 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).

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,791 reviews

2,215,748 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 957 reviews

1,260,853 users

Customize the way a web page displays or behaves, by using small bits of JavaScript.

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,501 reviews

2,257,668 users

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

Stylish by Jason Barnabe

Rated 4 out of 5 stars 752 reviews

670,765 users

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.

ImTranslator - Google Translator, Dictionary, TTS by Smart Link Corporation

Rated 4 out of 5 stars 424 reviews

341,821 users

ImTranslator provides translation powered by Google Translate, Microsoft, Babylon for 70+ languages. It includes Translator, Dictionary, Text-to-Speech, Back Translation.
Video Tutorial:

Xmarks Sync by Xmarks Inc.

Rated 4 out of 5 stars 2,516 reviews

314,532 users

Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!

Personas Plus by Mozilla

Rated 3 out of 5 stars 955 reviews

372,259 users

Personas are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite Personas.

YSlow by YSlow

Rated 3 out of 5 stars 195 reviews

98,548 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. is the official open source website.

Image Zoom by Jason Adams

Rated 4 out of 5 stars 333 reviews

170,566 users

Adds zoom and rotation functionality for images...

ReminderFox by Tom Mutdosch, Daniel Lee

Rated 4 out of 5 stars 495 reviews

94,489 users

ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.

StumbleUpon by StumbleUpon

Rated 4 out of 5 stars 214 reviews

109,986 users

StumbleUpon is the easiest way to discover new and interesting photos, videos, web pages and more, recommended by a community of experts. Tell us what you are interested in and we recommend page after page of amazing stuff you’d never expect to see.

AniWeather by AniWeather

Rated 4 out of 5 stars 582 reviews

54,044 users

AniWeather = Animated Weather + Any Weather.

When it rains, it really does!

InvisibleHand by InvisibleHand

Rated 4 out of 5 stars 183 reviews

40,723 users

Automatically get the lowest price when you shop online or search for flights. InvisibleHand shows a discreet notification when a better price is available on a product or flight you're shopping for. Covers over 580 retailers in the US, UK & Germany.

Shareaholic | share with Google, Facebook and more by The Shareaholic Team

Rated 4 out of 5 stars 260 reviews

13,898 users

Shareaholic is the easiest way to share & bookmark great content from anywhere on the web from one simple ALL-IN-ONE add-on. Works with Facebook, Twitter, Pinterest, Google, LinkedIn, E-mail and 200+ additional services.
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