Featured Add-ons

by Mozilla

148 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,861 reviews

20,780,432 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 335 reviews

988,344 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 1,570 reviews

1,416,670 users

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

Ghostery by José María Signanini, Brad McDermott

Rated 5 out of 5 stars 1,140 reviews

1,403,890 users

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

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 947 reviews

1,310,708 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,476 reviews

2,162,795 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 174 reviews

1,238,213 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 256 reviews

652,604 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.

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 485 reviews

1,021,873 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.

ZenMate Security & Privacy VPN by ZenMate

Rated 4 out of 5 stars 87 reviews

158,119 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.

iMacros for Firefox by iMacros

Rated 4 out of 5 stars 369 reviews

334,032 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...

Web of Trust - WOT by WOT Services

Rated 3 out of 5 stars 1,588 reviews

1,109,522 users

Find out which websites you can trust. WOT adds intuitive traffic light-style icons next to search results and URLs to help you make informed decisions about whether to visit a site or not.

Quick Translator by igv

Rated 5 out of 5 stars 468 reviews

268,178 users

The most lightweight and easiest translator. Translate between more than 80 languages with one click or a hot key. Translate from one word to a whole page.

Stylish by Jason Barnabe

Rated 4 out of 5 stars 734 reviews

732,129 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.

LastPass Password Manager by LastPass

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