Get Help
Pick your product
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
Firefox Private Network
Browse securely on public Wi-Fi using a Firefox add-on.
Firefox Focus
Automatic privacy browser and content blocker
MDN Plus
MDN Plus provides a custom user experience for MDN supporters.
Hubs
Virtual 3D meeting spaces for collaborating with friends, family, and colleagues on your browser or VR headset
Firefox for Enterprise
Firefox Quantum for businesses
Thunderbird
Email software for Windows, Mac and Linux
Featured Articles
Insecure password warning in Firefox
Firefox issues an insecure password warning when a web page's login form is not secure and your information could be stolen.
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.
How to change your default browser to Firefox on Windows
Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.
Captive portal detection
Page that describes how Firefox detects captive portal networks.
Join Our Community
Grow and share your expertise with others. Answer questions and improve our knowledge base.