uBlock Origin
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
7,872,253 users
AdBlocker Ultimate
Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.
2,285,509 users
DuckDuckGo Privacy Essentials
Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.
1,548,402 users
Privacy Badger
Automatically learns to block invisible trackers.
1,230,137 users
AdGuard AdBlocker
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
1,059,082 users
Ghostery – Privacy Ad Blocker
Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.
1,049,093 users
Facebook Container
Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
992,340 users
Malwarebytes Browser Guard
The fastest and safest web browsing experience. Secure your privacy by blocking trackers, blocking ads, and blocking malicious content.
518,196 users
Firefox Multi-Account Containers
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs. Cookies are separated by container, allowing you to use the web with multiple accounts and integrate Mozilla VPN for an extra layer of privacy.
372,827 users
Firefox Translations
Translate websites in your browser, privately, without using the cloud. The functionality from this extension is now integrated into Firefox.
323,548 users
NoScript Security Suite
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.
305,381 users
Decentraleyes
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.
265,416 users
Firefox Relay
Firefox Relay lets you generate email aliases that forward to your real inbox. Use it to hide your real email address and protect yourself from hackers and unwanted mail.
210,822 users
NordVPN - a VPN proxy extension for Firefox
Looking for the best VPN extension for Firefox? NordVPN's Firefox VPN proxy extension lets you hide your IP, change your virtual location, and stay safe online with a click. Get a fast, secure, and unlimited VPN for Firefox!
146,779 users
ESET Browser Privacy & Security
Enjoy extended browser protection with ESET Browser Privacy & Security—includes the unique Metadata Cleanup, Secure Search and more.
138,557 users
Qwant VIPrivacy
Qwant VIPrivacy sets Qwant.com as your default search engine, blocks trackers for you to protect your personal data while you browse.
115,771 users
ZenMate Free VPN
ZenMate VPN - The best free Firefox VPN extension to hide your IP. Encrypt your connection, access our secure proxy servers & unblock websites easily.
86,900 users
Surfshark VPN Extension
Enjoy unrestricted internet while keeping online activity and personal information secure!
85,284 users
Privacy Possum
Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.
74,876 users
Block Site
A customizable, password-protected website blocker and redirector.
71,794 users
AdNauseam
Blocking ads and fighting back against advertising surveillance.
69,518 users
Don't track me Google
Removes the annoying link-conversion at Google Search / maps / ...
66,413 users
Cookie-Editor
Cookie-Editor lets you efficiently create, edit and delete a cookie for the current tab. Perfect for developing, quickly testing or even manually managing your cookies for your privacy.
61,899 users
Popup Blocker Ultimate
Best Pop-up Blocker for Firefox. (Best in Rating, Performance, This addon does NOT collect user's data same as Poper Blocker)If your Firefox version is not 57+ please install version 8.1 from Official website.
61,623 users
Popup Blocker (strict)
Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address
61,388 users