Featured Add-ons

by Mozilla

99 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,956 reviews

19,423,785 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 881 reviews

3,460,305 users

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

YouTube High Definition by Baris Derin

Rated 5 out of 5 stars 240 reviews

586,886 users

YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 470 reviews

1,126,086 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 1,844 reviews

1,248,217 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,635 reviews

2,228,361 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 1,023 reviews

1,209,920 users

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

Ghostery by Ghostery

Rated 5 out of 5 stars 1,362 reviews

1,392,521 users

Increase your browsing privacy, protection, and speed.

AdBlocker Ultimate by AdBlocker Ultimate

Rated 5 out of 5 stars 1,085 reviews

410,467 users

Free and improved ad blocker. Completely remove ALL ads. No "acceptable" ads or whitelisted advertisers, block tracking, block malware!

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 440 reviews

740,884 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!

Emoji Keyboard by Harry N.

Rated 5 out of 5 stars 46 reviews

74,839 users

A free extension of the web tool https://emojikeyboard.org. It helps input emoji in the web browser with an extensive search functionality.

HTTPS Everywhere by EFF Technologists

Rated 4 out of 5 stars 132 reviews

333,370 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.

AdBlocker for YouTube™ by AdblockLite

Rated 4 out of 5 stars 38 reviews

337,226 users

AdBlocker for YouTube™ removes all annoying Ads from YouTube

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 371 reviews

272,831 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.

QuickJava by Doug G

Rated 5 out of 5 stars 210 reviews

262,434 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.
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