Most Popular Extensions

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BlockSite

BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.

Rated 3 out of 5 stars (450)
209,899 users

Disconnect Featured

Make the web faster, more private, and more secure.

Rated 5 out of 5 stars (79)
208,461 users

PDF Download

Use PDF Download to do whatever you like with PDF files on the Web. Regain control and eliminate browser problems, view PDFs directly in Firefox as HTML, and use the all-new Web-to-PDF toolbar to save and share Web pages as high-quality PDF files.

Rated 2 out of 5 stars (640)
207,854 users

Updated Ad Blocker for Firefox 11+

It blocks ads on the web pages you visit including Youtube, Hulu, TwitchTV/JustinTV, most Major News Sites(cnn/fox/nbc/msnbc) and many more. Ads from services like Google AdSense Yahoo DoubleClick It also blocks the GoogleAnalytics tracking script.

Rated 3 out of 5 stars (41)
205,205 users

SQLite Manager

Manage any SQLite database on your computer.

Rated 5 out of 5 stars (57)
204,897 users

Fast Dial

Visual bookmarks for Firefox. (Works with all latest versions of Firefox)

Rated 3 out of 5 stars (2,236)
204,665 users

Image Zoom

Adds zoom and rotation functionality for images...

Rated 4 out of 5 stars (310)
203,987 users

Mozilla Archive Format, with MHT and Faithful Save Featured

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

Rated 5 out of 5 stars (196)
194,454 users

Awesome Screenshot Plus - Capture, Annotate & More No Restart

Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!

Rated 4 out of 5 stars (882)
193,983 users

Live HTTP Headers

View HTTP headers of a page and while browsing.

Rated 4 out of 5 stars (136)
193,927 users

StumbleUpon

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.

Rated 4 out of 5 stars (202)
192,058 users

ScrapBook

Helps you to save Web pages and organize the collection.

Rated 4 out of 5 stars (680)
191,677 users

Menu Editor

Customize application menus:

Rearrange or remove menuitems from the main context menu (right-click menu) and main menubar (File Edit View etc.)

Rated 4 out of 5 stars (586)
190,712 users

ReloadEvery

Reloads web pages every so many seconds or minutes. The function is accessible via the context menu (menu you get when you right click on a web page) or via tab context menu (right click on the tab)

Rated 4 out of 5 stars (619)
190,581 users

SaveFrom.net helper all-in-1 / youtube downloader

SaveFrom.net helper enables you to download from more than 40 websites, including YouTube.com, Vk.com, Soundcloud.com, RapidShare.com, Filefactory.com, Myspace.com, Facebook.com and many others just in ONE CLICK.

Rated 4 out of 5 stars (130)
183,823 users

Password Exporter

This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Rated 4 out of 5 stars (274)
183,450 users

IE Tab + (FF 8+, 7, 6, 5, 4, 3.6, 3.5, SeaMonkey)

IE Tab + is an enhanced version of IE Tab. It supports FF 3.5 or greater, integrates IE Tab with Adblock Plus in the IE Tab engine, and synchronizes cookies between IE and Firefox. You can easily import settings from the original IE Tab into IE Tab +

Rated 3 out of 5 stars (72)
182,247 users

PDF Viewer No Restart

PDF.js brings Portable Document Format (PDF) reading capabilities to your browser using web standard technologies.

Please report issues to: https://github.com/mozilla/pdf.js/issues

Rated 4 out of 5 stars (217)
180,870 users

S3.Google Translator Featured

S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.

Rated 5 out of 5 stars (99)
178,250 users

ChatZilla Featured

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

Rated 4 out of 5 stars (115)
171,850 users