Featured Add-ons

by Mozilla

113 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 5,333 reviews

16,577,184 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 1,733 reviews

3,968,577 users

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

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 498 reviews

1,020,683 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.

Bulk Media Downloader by InBasic

Rated 4 out of 5 stars 107 reviews

154,387 users

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

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 1,772 reviews

1,121,318 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

2,163,599 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.

Enhancer for YouTube™ by Maxime RF

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

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,075 reviews

1,085,577 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

1,079,327 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!

Ghostery by Ghostery

Rated 4 out of 5 stars 1,429 reviews

1,229,673 users

Increase your browsing privacy, protection, and speed.

AdBlocker Ultimate by AdBlocker Ultimate

Rated 5 out of 5 stars 1,783 reviews

397,893 users

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

HTTPS Everywhere by EFF Technologists

Rated 4 out of 5 stars 181 reviews

381,266 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.

Emoji Keyboard by Harry N.

Rated 4 out of 5 stars 69 reviews

126,014 users

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

YouTube High Definition by Baris Derin

Rated 5 out of 5 stars 231 reviews

505,068 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

245,642 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+!)
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
Results 115 of 113