Featured Add-ons

by Mozilla

113 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 5,326 reviews

16,355,434 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 1,726 reviews

3,916,050 users

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

Bulk Media Downloader by InBasic

Rated 4 out of 5 stars 107 reviews

152,257 users

Grab and download media (image, audio, and video) resources by monitoring network (like FlashGot or Flash video downloader extensions)

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 498 reviews

1,009,462 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 1,771 reviews

1,110,410 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,566 reviews

2,166,135 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 1,075 reviews

1,079,185 users

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

iMacros for Firefox by Ipswitch, Inc.

Rated 4 out of 5 stars 483 reviews

1,073,182 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!

Enhancer for YouTube™ by Maxime RF

Tons of features to improve your user experience on YouTube™.

Ghostery by Ghostery

Rated 4 out of 5 stars 1,424 reviews

1,222,150 users

Increase your browsing privacy, protection, and speed.

AdBlocker Ultimate by AdBlocker Ultimate

Rated 5 out of 5 stars 1,773 reviews

395,653 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 4 out of 5 stars 69 reviews

124,530 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 180 reviews

377,796 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.

YouTube High Definition by Baris Derin

Rated 5 out of 5 stars 231 reviews

505,803 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.

QuickJava by Doug G

Rated 5 out of 5 stars 189 reviews

241,277 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+!)
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