Featured Add-ons

by Mozilla

150 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,920 reviews

19,418,734 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).

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 342 reviews

933,132 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 1,590 reviews

1,321,496 users

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

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 955 reviews

1,207,532 users

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

Ghostery by José María Signanini, Brad McDermott

Rated 5 out of 5 stars 1,165 reviews

1,365,080 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 1,490 reviews

2,078,029 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.

Adblock Plus Pop-up Addon by Jesse Hakanen

Rated 5 out of 5 stars 176 reviews

1,156,741 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.

YouTube Video and Audio Downloader by InBasic, Alopepeo

Rated 4 out of 5 stars 276 reviews

625,474 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.

ZenMate Security & Privacy VPN by ZenMate

Rated 4 out of 5 stars 117 reviews

169,163 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 491 reviews

913,084 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 1,625 reviews

1,002,670 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

LastPass Password Manager by LastPass

Rated 4 out of 5 stars 1,216 reviews

324,006 users

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

iMacros for Firefox by iMacros

Rated 4 out of 5 stars 376 reviews

394,250 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...

Stylish by Jason Barnabe

Rated 4 out of 5 stars 743 reviews

658,274 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.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 246 reviews

364,213 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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