Firefox Translations
Translate websites in your browser, privately, without using the cloud. The functionality from this extension is now integrated into Firefox.
318,050 users
Disable WebRTC
WebRTC leaks your actual IP addresses from behind your VPN, by default.
29,626 users
Free VPN Proxy & Ad Blocker - Planet VPN
Unblock access to any website with our free VPN proxy Mozilla extension - Planet VPN
51,282 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.
85,202 users
Simple Tab Groups
Create, modify, and quickly change tab groups
80,675 users
600% Sound Volume
Up to 600% volume boost
151,405 users
Chameleon
Spoof your browser profile. Includes a few privacy enhancing options. A WebExtension port of Random Agent Spoofer.
8,475 users
Windscribe - Free VPN and Ad Blocker
Windscribe helps you circumvent censorship, block ads, beacons and trackers on websites you use every day.
87,506 users
Plasma Integration
Multitask efficiently by controlling browser functions from the Plasma desktop.
69,788 users
scriptsafe-ff
The well known browser extension/addon that gives users control of the web and more secure browsing while emphasizing simplicity and intuitiveness. Since the original developer seemingly has abandoned the project. ... New Repo/Maintainer!
2,163 users
Browsing Protection by F-Secure
Extension for protecting encrypted browsing with security products by F-Secure.
191,358 users
Global Speed
Set a default speed for video and audio.
59,867 users
VPN add-on
Anonymous, secure and unrestricted VPN service! Unblock websites and access unlimited content with a free VPN by uVPN
29,174 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.
985,534 users
Coupert - Automatic Coupon Finder & Cashback
Coupert automatically finds coupons, applies best coupon code at checkout & gives you cashback.
236,645 users
Proxy SwitchyOmega
Manage and switch between multiple proxies quickly & easily.
52,250 users
752 users
Quick Accept-Language Switcher
Provides a quick way of changing the HTTP Accept-Language header so you can view and test websites with a different locale.
2,599 users
BetterTTV
Enhances Twitch and YouTube with new features, emotes, and more.
451,000 users
User-Agent Switcher
Easily override the browser's User-Agent string
63,276 users
DownThemAll!
The Mass Downloader for your browser
212,613 users
SoundFixer
Helps you fix annoying sound problems on sites like YouTube: audio in one channel only, too quiet or too loud. (Unfortunately, this extension does not work on all websites because of cross-domain issues — but it does work on YouTube!)
34,723 users
Avast Online Security & Privacy
Secure your Mozilla Firefox browser against real-time online threats, trackers, and scams. We’ll check every site you visit, from Facebook to your bank, so nothing puts you or your data at risk. Join a growing community of 400 million Avast users.
182,492 users
Free Download Manager official extension
Free Download Manager integration with your Firefox browser
89,576 users
360 Internet Protection
This extension is web threat protection of 360 Total Security for Firefox. It identifies malicious URL in real-time and blocks web threats. The capabilities of anti-fraud, anti-phishing and anti-malicious URL will be enabled once installed.
78,812 users