Most Popular Extensions

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Youtube MP3 Podcaster

Self contained add-on for downloading youtube videos to mp3 for easy listening on podcasting gadgets like a Zune or iPod

Rated 4 out of 5 stars (149)
174,706 users

MeasureIt

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Rated 4 out of 5 stars (305)
174,329 users

New Tab Homepage

A very simple tabbed browsing extension that loads your homepage when you open a new tab. If you have multiple homepages, the first is chosen.

Rated 4 out of 5 stars (305)
173,756 users

Fasterfox

The One; The Original Fasterfox Gives performance & network tweaks for Firefox. Fasterfox makes your browsing much faster!
Make your Sites Faster then a Fox with Fasterfox for FireFox!

Rated 4 out of 5 stars (68)
170,727 users

Webmail Ad Blocker No Restart Featured

Expand your email area by blocking and removing ads on the right hand side of the screen when using Gmail, Hotmail, Outlook.com and Yahoo Mail.

Rated 4 out of 5 stars (151)
168,714 users

Feedly - Beyond Google Reader Featured

A productive way to organize, read and share the content of your favorite feeds, blogs and news sites. Feedly offers a seamless transition from Google Reader.

Rated 5 out of 5 stars (3,236)
168,510 users

xThunder

Manage popular downloaders (Windows, Linux, Mac) and support special links of thunder,flashget,qqdl,ed2k,magnet,fs2you.

Rated 5 out of 5 stars (76)
160,948 users

FoxTab

3D in your browser! FoxTab brings innovative 3D functionality to your Firefox.

New! Top Sites for FoxTab (aka Speed Dial).

Rated 4 out of 5 stars (1,481)
157,371 users

ImgLikeOpera

ImgLikeOpera allows load only the images that you want in Firefox browser. This extension is very useful for non broadband users...

Rated 4 out of 5 stars (284)
156,631 users

Memory Fox

Attempting to reduce both Browser and Flash RAM Memory usage. Memory Fox will promote the increase of available RAM memories for other application processes. Hopefully, fostering any attempts of Memory Recovery and Retention.

Rated 4 out of 5 stars (260)
156,046 users

FEBE Featured

FEBE (Firefox Environment Backup Extension) allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up -- It will actually rebuild your extensions individually into installable .xpi files.

Rated 4 out of 5 stars (550)
154,878 users

Speed Dial [FVD] - New Tab Page, Sync... Featured

FVD Speed Dial - Speed dial button, Online Synchronization, New Tab Start Page, Organize bookmarks, Custom backgrounds, custom dials, organized groups, most visited dials.

Rated 5 out of 5 stars (1,151)
154,541 users

DOM Inspector

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Rated 5 out of 5 stars (55)
153,953 users

Youtube Downloader - Video Downloader

Download from YouTube and thousands other video websites. Share and tag videos using Clickberry!

Rated 4 out of 5 stars (7)
151,901 users

AddThis Featured

AddThis for Firefox is the best add-on to make sharing and bookmarking simple. Have all your favorite web 2.0 social networking, bookmarking, blogging, and e-mail services at your fingertips. Share any page, anytime, with anyone.

Rated 4 out of 5 stars (216)
151,721 users

Classic Compact Options

This add-on allows one to customize the theme "Classic Compact". Options include: 10 different toolbar button sets; turning off gradient backgrounds; OS scrollbars; dark system color support; merging menu bar into one menu button; etc.

Rated 5 out of 5 stars (52)
151,541 users

Self-Destructing Cookies No Restart

Cookies when you need them, not when others need them to track you - gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.

Rated 4 out of 5 stars (260)
151,024 users

Print pages to Pdf Featured

Creates one Pdf from any amount of open Browsertabs,Bookmarks/-folder, Scrapbook(Plus) pages. This document can be archived, sended by e-mail or printed out with any standard Pdf Viewer.

Rated 5 out of 5 stars (190)
149,788 users

YSlow

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

Rated 3 out of 5 stars (167)
147,743 users

Status-4-Evar Featured

Status bar widgets and progress indicators for Firefox 4+

Rated 5 out of 5 stars (444)
145,800 users