Featured Add-ons

by Mozilla

143 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,812 reviews

20,660,609 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 519 reviews

1,143,444 users

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

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 986 reviews

1,297,198 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 407 reviews

1,071,801 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 1,737 reviews

1,297,091 users

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

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,574 reviews

2,152,498 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 1,271 reviews

1,467,567 users

Enjoy a faster, safer and cleaner browsing experience.

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 394 reviews

401,329 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 194 reviews

1,127,630 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

847,745 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 334 reviews

800,674 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 1,394 reviews

939,794 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 31 reviews

293,641 users

AdBlock for YouTube™ removes all annoying Ads from YouTube

YouTube High Definition by Baris Derin

Rated 5 out of 5 stars 227 reviews

283,279 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.

Google Translate, ImTranslator, Dictionary, TTS by Smart Link Corporation

Rated 4 out of 5 stars 441 reviews

336,924 users

COMPLETELY REDESIGNED TRANSLATOR FOR FIREFOX
ImTranslator translates text, words, webpages between more than 90 languages.
NEW: Inline Translator, Dictionary, access to Google Translate, Microsoft Translator. Unique on the fly localization.
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