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Firefox
Web browser for Windows, Mac and Linux
Firefox for Android
Web browser for Android smartphones and tablets
Firefox for iOS
Firefox for iPhone, iPad and iPod touch devices
Mozilla VPN
VPN for Windows 10, Mac, Linux, Android, and iOS devices
Firefox Relay
Service that lets you create email masks to hide your real email address
Mozilla Monitor
Find out if your private information has been exposed in a known data breach
Discover and save stories for later
MDN Plus
MDN Plus provides a custom user experience for MDN supporters
Firefox Focus
Automatic privacy browser and content blocker
Firefox for Enterprise
Firefox Quantum for businesses
Thunderbird
Email software for Windows, Mac and Linux
Thunderbird for Android
Email app for Android smartphones and tablets
Featured Articles
Secure connection failed and Firefox did not connect
If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.
Get community support
Learn how to connect with the Mozilla community to ask questions and find solutions from fellow users.
Add-on Badges
You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.
Captive portal detection
Description of how Firefox detects captive portal networks.
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