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, 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
Add-on signing in Firefox
Learn about add-on signing and what to do if an extension you want to use could not be verified for use in Firefox.
Insecure connection password warning in Firefox
Firefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.
Install Firefox on Linux
This article describes how to download and install Firefox on Linux.
Captive portal detection
Description of how Firefox detects captive portal networks.
Join Our Community
Grow and share your expertise with others. Answer questions and improve our knowledge base.