Featured Add-ons

by Mozilla

152 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,928 reviews

20,652,753 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).

Lightbeam for Firefox by Mozilla

Rated 4 out of 5 stars 396 reviews

506,074 users

Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 351 reviews

1,001,950 users

An extension that adds direct links to download YouTube videos as MP4 and FLV. It has a simple interface and it downloads videos directly from YouTube. The extension integrates with YouTube's interface and adds a download button below the player.

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 5 out of 5 stars 1,597 reviews

1,374,052 users

The first and only download manager/accelerator built inside Firefox!

Ghostery by José María Signanini, Brad McDermott

Rated 5 out of 5 stars 1,176 reviews

1,458,425 users

Protect your privacy. See who's tracking your web browsing and block them with Ghostery.

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,495 reviews

2,222,262 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.

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 956 reviews

1,266,788 users

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

YouTube Video and Audio Downloader by InBasic, Alopepeo

Rated 4 out of 5 stars 279 reviews

671,181 users

Downloads YouTube videos in all available formats (FLV, MP4, WebM, and 3GP) with video quality of your choice. It also contains a pure JavaScript library to extract the ORIGINAL audio file embedded in video files.

Adblock Plus Pop-up Addon by Jesse Hakanen

Rated 5 out of 5 stars 177 reviews

1,211,909 users

Adblock Plus Pop-up Addon extends the blocking functionality of Adblock Plus to those annoying pop-up windows that open on mouse clicks and other user actions.

ZenMate Security & Privacy VPN by ZenMate

Rated 4 out of 5 stars 124 reviews

189,194 users

Unblock the web and change your IP with 4 locations across the globe. ZenMate secures your browsing with encryption - protecting you from hackers, snoopers and data thieves who prey on unsecure connections.

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 494 reviews

947,072 users

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

Web of Trust, WOT: Website Reputation Ratings by WOT Services

Rated 3 out of 5 stars 1,628 reviews

1,047,259 users

Find out which websites you can trust. WOT adds intuitive traffic light-style icons next to search results and URLs so you can decide whether to visit a site:
• Green – The site is trusted
• Yellow – Be cautious
• Red – Online threats detected

iMacros for Firefox by iMacros

Rated 4 out of 5 stars 378 reviews

421,628 users

Automate Firefox. Record and replay repetitious work. If you love the Firefox web browser, but are tired of repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords, then iMacros for Firefox is the soluti...

LastPass Password Manager by LastPass, Andrew Zitnay

Rated 4 out of 5 stars 1,227 reviews

448,609 users

LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 248 reviews

384,710 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
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