Featured Add-ons

by Mozilla

141 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,797 reviews

21,424,751 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).

WhatsApp™ Desktop by Elen Norphen

Rated 4 out of 5 stars 42 reviews

121,040 users

WhatsApp™ Desktop provides an easy access to WhatsApp, and notifies you of incoming posts.

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 981 reviews

1,307,323 users

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

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 400 reviews

1,095,763 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 1,720 reviews

1,337,796 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,562 reviews

2,306,672 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.

Ghostery by Ghostery

Rated 4 out of 5 stars 1,307 reviews

1,519,809 users

Enjoy a faster, safer and cleaner browsing experience.

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 391 reviews

457,382 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!

Adblock Plus Pop-up Addon by Jesse Hakanen

Rated 5 out of 5 stars 192 reviews

1,176,983 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.

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 524 reviews

880,414 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.

Google Translator for Firefox by nobzol

Rated 4 out of 5 stars 332 reviews

822,056 users

With this addon you can translate any text to your own language with one click or hot-key. You can either translate the selected text, this way the translated text will overwrite the original selected text, or you can translate the full page too.

Web of Trust, WOT: Website Reputation Ratings by WOT Services

Rated 4 out of 5 stars 1,444 reviews

988,213 users

Find out which websites you can trust. WOT adds intuitive traffic light-style icons next to search results and URLs so you can decide whether to visit a site:
• Green – The site is trusted
• Yellow – Be cautious
• Red – Online threats detected

AdBlock for YouTube™ by AdblockLite

Rated 4 out of 5 stars 28 reviews

291,461 users

AdBlock for YouTube™ removes all annoying Ads from YouTube

YouTube High Definition by Baris Derin

Rated 5 out of 5 stars 224 reviews

287,258 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.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 262 reviews

349,652 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
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