Featured Add-ons

by Mozilla

104 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 5,030 reviews

18,735,479 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 985 reviews

3,590,250 users

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

YouTube High Definition by Baris Derin

Rated 5 out of 5 stars 241 reviews

650,290 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 478 reviews

1,083,017 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 1,851 reviews

1,195,528 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,648 reviews

2,186,774 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 1,034 reviews

1,153,619 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 1,389 reviews

1,352,072 users

Increase your browsing privacy, protection, and speed.

QuickJava by Doug G

Rated 5 out of 5 stars 211 reviews

254,714 users

Allows quick enable and disable of Javascript, Cookies, Image Animations, Flash, Silverlight, Images, Stylesheets and Proxy from the Toolbar. This is great for increasing security or decreasing bandwidth. (Read details for info on Java with FF52+!)

iMacros for Firefox by Ipswitch, Inc.

Rated 4 out of 5 stars 455 reviews

911,465 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!

AdBlocker Ultimate by AdBlocker Ultimate

Rated 5 out of 5 stars 1,196 reviews

407,884 users

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

Emoji Keyboard by Harry N.

Rated 5 out of 5 stars 50 reviews

92,057 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 143 reviews

338,598 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 43 reviews

328,391 users

AdBlocker for YouTube™ removes all annoying Ads from YouTube

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 370 reviews

257,586 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.
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