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Web browser for Windows, Mac and Linux
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Web browser for Android smartphones and tablets
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Firefox for iPhone, iPad and iPod touch devices
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VPN for Windows, 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
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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
Common Myths about Private Browsing
Learn more about common misconceptions about Private Browsing in Firefox.
Captive portal detection
Description of how Firefox detects captive portal networks.
Update Firefox to prevent add-ons issues from root certificate expiration
Update to Firefox 128+ by March 14, 2025, to avoid issues with add-ons, DRM media and essential features due to an expiring root certificate.
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.
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