Featured Add-ons

by Mozilla

148 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,844 reviews

19,419,599 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 596 reviews

1,324,220 users

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

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,834 reviews

2,157,000 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Download YouTube Videos as MP4 by ialc

Rated 4 out of 5 stars 417 reviews

1,063,200 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 1,769 reviews

1,234,701 users

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

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,001 reviews

1,221,266 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,566 reviews

2,058,433 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 5 out of 5 stars 1,295 reviews

1,366,576 users

Increase your browsing privacy, protection, and speed.

BetterPrivacy-signed by IKRG

Control a new, trickier kind of cookie, better known as an LSO or Flash cookie. The BetterPrivacy safeguard offers various ways to handle Flash-cookies created by webpages with the help of your Flash plug-in...

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 417 reviews

469,026 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!

Google Translator for Firefox by nobzol

Rated 4 out of 5 stars 346 reviews

763,013 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.

Adblock Plus Pop-up Addon by Jesse Hakanen

Rated 5 out of 5 stars 202 reviews

1,033,331 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 531 reviews

781,712 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.

Stylish by Jason Barnabe

Rated 4 out of 5 stars 821 reviews

454,787 users

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Tumblr, and many, many other sites. You can even customize Firefox and other programs themselves.

Web of Trust, MyWOT/WOT: Website Reputation Rating by WOT Services

Rated 4 out of 5 stars 1,311 reviews

864,302 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
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