Featured Add-ons

by Mozilla

146 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,815 reviews

20,352,526 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).

uBlock Origin by Raymond Hill

Rated 5 out of 5 stars 546 reviews

1,254,339 users

Finally, an efficient blocker. Easy on CPU and memory.

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 411 reviews

1,081,213 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 4 out of 5 stars 1,753 reviews

1,297,294 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,579 reviews

2,123,575 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 for YouTube™ by AdblockLite

Rated 4 out of 5 stars 32 reviews

306,608 users

AdBlock for YouTube™ removes all annoying Ads from YouTube

Ghostery by Ghostery

Rated 5 out of 5 stars 1,266 reviews

1,457,804 users

Increase your browsing privacy, protection, and speed.

Adblock Plus Pop-up Addon by Jesse Hakanen

Rated 5 out of 5 stars 198 reviews

1,098,497 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.

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 993 reviews

1,295,050 users

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

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 358 reviews

292,045 users

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 533 reviews

829,519 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.

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 396 reviews

436,952 users

Automate Firefox. Record and replay repetitive tasks. If you're tired of manually visiting the same sites, filling out forms, downloading files and extracting data, then iMacros is for you! Save time, effort and money with iMacros browser automation!

QuickJava by Doug G

Rated 5 out of 5 stars 202 reviews

277,339 users

Allows quick enable and disable of Java, Javascript, Cookies, Image Animations, Flash, Silverlight, Images, Stylesheets and Proxy from the Toolbar. This is great for increasing security or decreasing bandwidth.

HTTPS Everywhere by EFF Technologists

Rated 4 out of 5 stars 81 reviews

193,512 users

Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.

User-Agent Switcher by Linder

Rated 4 out of 5 stars 26 reviews

54,117 users

Quickly and easily switch between popular user-agent strings.
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