Add-ons for Firefox

Add on style. Add on function. Add features to Firefox.
Choose from 5000 free extras to make your browser look and function the way you want.
An add-on can be a new time-saving toolbar button, a shortcut to search, a themed look, and more. Add-ons make browsing easier.
Choose add-ons for the way you browse. Install in a few clicks and they stay up to date with easy reminders. Explore and add on now!
Build the perfect website

Pixel Perfect
Pixel Perfect is a Firefox/Firebug extension that allows web developers and...
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YSlow

YSlow analyzes web pages and why they're slow based on Yahoo!'s...

Download Now recommended

Firebug

Firebug integrates with Firefox to put a wealth of development tools at your...

Download Now recommended

Get the latest scores and highlights

Research anything online

Clipmarks

Clipmarks lets you clip and share specific parts of articles, blog posts or...

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Hyperwords

Select any text on any web page and choose from powerful commands.

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Like these? Find more add-ons in the Reference Desk collection.

Get the most out of your money

myTimeZone for eBay

Automatically converts times on eBay pages to your local time zone and...

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Amazon Button

Our users say "A must have for Amazon Shoppers". Easily navigate...

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Woot Watcher

Woot Watcher monitors the Woot! web site, and keeps you updated with the...

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Like these? Find more add-ons in the Online Shopping collection.

Plan business trips and unforgettable vacations

Fotofox

Drag, drop and arrange pictures adding photo titles, and create albums by...

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Yapta

Comparison shop for the best fares on airline websites. Yapta will track...

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BabelFish Instant Translation

Most easy, highly customizeable, and quick Firefox translation interface:...

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Like these? Find more add-ons in the Traveler's Pack collection.

Browse Add-ons

Download Now recommended

Gmail Manager by Todd Long

The original Gmail notifier for multiple accounts. Allows you to receive new mail notifications along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.

Rated 5 out of 5 stars 452 reviews 63,914 weekly downloads Updated October 1, 2009

Support this add-on: Contribute $5.00

Download Now recommended

Firefox Showcase by Josep del Rio

Easily find and manage your browser tabs.

Rated 5 out of 5 stars 107 reviews 75,185 weekly downloads Updated September 27, 2009

Support this add-on: Contribute $2.99

Download Now recommended

ImTranslator by Smart Link Corporation

ImTranslator includes Online Translator in 1640 language combinations for Albanian, Arabic, Bulgarian, Catalan, Chinese (Simp.), Chinese (trad.), Croatian, Czech, Danish, Dutch, English, Estonian, Filipino, Finnish, French, Galician, German, Greek, ...

Rated 4 out of 5 stars 119 reviews 95,297 weekly downloads Updated July 31, 2009

Support this add-on

Download Now recommended

Evernote Web Clipper by Evernote Corp

This extension provides a toolbar button and context menus to easily add a selection or an entire page to Evernote.

If Evernote for Mac or Windows is installed - the clips go directly to the local application, if not the clips go to ...

Rated 4 out of 5 stars 29 reviews 15,969 weekly downloads Updated November 18, 2009

Collections

Collections are a way for you to categorize, mix, match and mingle add-ons. Subscribe to collections created by other users or create your own.

Popular Collections

Windows 7 Theme for Firefox 3.5 by Enkei

Seamlessly Perfect Windows 7 Theme for Firefox 3.5 - Google Tweaked - Time Conserving add-ons (skip screen, showcase, smarterfox) - Stylish Add-on with Styles list!

11 add-ons 23451 subscribers

Web Developer's Toolbox by Mozilla

Speed up the development process by using add-ons to troubleshoot, edit, and debug web projects without ever clicking away from Firefox.

12 add-ons 7064 subscribers

Reference Desk by Mozilla

Make the librarian jealous with add-ons that help students, researchers or anyone with a tough question find and document all the answers.

13 add-ons 4394 subscribers

Lifehacker's Must-Have Extensions by Lifehacker.Addons

Ten broadly useful extensions, as detailed at: http://bit.ly/10Xxc (There are technically 10, but Gears can't be installed from Mozilla's site)

9 add-ons 3528 subscribers

Better Pack by Lifehacker.Addons

Lifehacker's "Better" add-ons, compiling multiple Greasemonkey tweaks for YouTube, Reader, Gmail, Google Calendar, Flickr, and other sites.

6 add-ons 2382 subscribers

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Categories

Most Shared Add-ons (Last 7 Days)

Build a Firefox Add-on

Add on style. Add on function. Add features to Firefox.

Build the perfect website

Pixel Perfect

YSlow

Firebug

Get the latest scores and highlights

College Football Boom - follow your favorite NCAA team

Pro Football Toolbar and Theme - follow your favorite NFL team

NBA Scoreboard 2010

Research anything online

Clipmarks

Hyperwords

ChartLet

Get the most out of your money

myTimeZone for eBay

Amazon Button

Woot Watcher

Plan business trips and unforgettable vacations

Fotofox

Yapta

BabelFish Instant Translation

Browse Add-ons

Gmail Manager by Todd Long

Firefox Showcase by Josep del Rio

ImTranslator by Smart Link Corporation

Evernote Web Clipper by Evernote Corp

Collections

Popular Collections

Windows 7 Theme for Firefox 3.5 by Enkei

Web Developer's Toolbox by Mozilla

Reference Desk by Mozilla

Lifehacker's Must-Have Extensions by Lifehacker.Addons

Better Pack by Lifehacker.Addons