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
Manage local site storage settings
Learn about local storage, how to access storage settings, remove site data or set exceptions for websites to store data in Firefox.
About private browsing in Firefox for iOS
Learn how to open and use private browsing in Firefox for iOS, plus answers to common questions.
Make Firefox your default browser on Windows
Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.
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.