Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
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.
1 681 972 users
An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.
44 224 users
Custom color schemes for all websites: night mode, dark themes, blue light filter, screen shader, high contrast, grayscale, etc.
6 486 users
Download YouTube videos in all available formats and extract the original audio files
181 874 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.
249 319 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.
954 998 users
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
982 923 users
A secure and free password manager for all of your devices.
173 905 users
RoboForm, the #1 ranked Password Manager makes your life easier by remembering passwords and logging you into websites automatically
93 862 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.
75 741 users