Firefox add-ons with Featured badge in Firefox Browser Add-ons

Add-ons (also known as extensions) are small programs that run inside web browsers like Mozilla Firefox. They add extra features to the browser without having to download anything new. You can use extensions to make browsing faster, easier, and safer. Some extensions even let you do things like translate text on websites, search the web, and play games.

There are over 28,000 Firefox-addons and 480,000 themes, making it hard to find the best ones. so we have created a way to sort through all of them. Use the dropdown above to set different filters. Add-ons are sorted by number of active users.

To set even more advanced filters, and sort the Firefox add-ons differently, please visit our Advanced search tool. Note that Advanced search tool is only available to premium members.

#1, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,556)

7,836,120

#2, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,556)

7,836,120

#3, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,556)

7,836,120

#4, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,556)

7,836,120

#5, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,556)

7,836,120

#6, uBlock Origin

Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

4.79 (17,556)

7,836,120

#7, AdBlocker Ultimate

AdAvoid

Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.

4.78 (24,296)

2,269,664

#8, Video DownloadHelper

mig

The easy way to download and convert Web videos from hundreds of YouTube-like sites.

4.26 (26,615)

1,959,858

#9, DuckDuckGo Privacy Essentials

DuckDuckGo

Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.

4.36 (2,113)

1,549,232

#10, Privacy Badger

EFF Technologists

Automatically learns to block invisible trackers.

4.80 (2,421)

1,226,154

#11, Dark Reader

Dark Reader Ltd

Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

4.53 (5,572)

1,161,917

#12, AdGuard AdBlocker

Adguard Software Ltd

Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.

4.70 (5,659)

1,051,351

#13, Ghostery – Privacy Ad Blocker

Ghostery

Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.

4.30 (4,167)

1,047,343

#14, To Google Translate

Juan Escobar

Right-click a section of text and click the Translate icon next to it to text translate or listen to it in your language.

4.07 (3,469)

1,021,275

#15, Bitwarden Password Manager

Bitwarden Inc.

At home, at work, or on the go, Bitwarden easily secures all your passwords, passkeys, and sensitive information.

4.76 (7,862)

729,348

#16, Return YouTube Dislike

Dmitry Selivanov

Returns ability to see dislike statistics on youtube

4.74 (4,034)

640,242

#17, Easy Youtube Video Downloader Express

Dishita

A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.

4.23 (14,881)

571,181

#18, Enhancer for YouTube™

Maxime RF

Take control of YouTube and boost your user experience!

4.71 (11,161)

562,701

#19, AdBlocker for YouTube™

AdblockLite

Remove all annoying ads from YouTube.

4.04 (1,041)

457,796

#20, SponsorBlock - Skip Sponsorships on YouTube

Ajay (SponsorBlock)

Easily skip YouTube video sponsors. When you visit a YouTube video, the extension will check the database for reported sponsors and automatically skip known sponsors. You can also report sponsors in videos. Other browsers: https://sponsor.ajay.app

4.80 (2,259)

434,521

#21, Grammar and Spell Checker - LanguageTool

LanguageTooler GmbH

With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

4.73 (3,915)

344,678

#22, Search by Image

Armin Sebastian

A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

4.63 (1,454)

313,076

#23, Simple Translate

sienori

Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.

4.68 (1,865)

311,029

#24, NoScript Security Suite

Giorgio Maone

The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.

4.40 (2,204)

304,805

#25, Decentraleyes

Thomas Rientjes

Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.

4.80 (1,424)

265,063