Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
With EPUBReader you can read ePub files just in Firefox. No additional software needed!
159 780 users
Prevent tabs opened by a hyperlink from hijacking the previous tab by adding the rel=noopener attribute to all hyperlinks (excluding same-domain hyperlinks).
10 154 users
This is probably a laser cat add-on so you can shoot laser cat lasers at things.
3 716 users
Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.
85 566 users
Automatically learns to block invisible trackers.
756 885 users
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.
214 349 users
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.
782 392 users
Finally, an efficient blocker. Easy on CPU and memory.
5 074 894 users
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
2 788 985 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 other web security exploits. Disabled and can't reinstall? https://tinyurl.com/moz-ext-cert
1 573 090 users
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
902 312 users
A secure and free password manager for all of your devices.
139 830 users
The best way to experience 1Password in your browser. Easily sign in to sites, generate passwords, and store secure information, including logins, credit cards, notes, and more.
56 588 users
RoboForm, the #1 ranked Password Manager makes your life easier by remembering passwords and logging you into websites automatically
88 467 users