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Firefox
Web browser for Windows, Mac and Linux
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Firefox for Android
Web browser for Android smartphones and tablets
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Firefox for iOS
Firefox for iPhone, iPad and iPod touch devices
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Mozilla VPN
VPN for Windows 10, Mac, Linux, Android, and iOS devices
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Firefox Relay
Service that lets you create email masks to hide your real email address
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Mozilla Monitor
Find out if your private information has been exposed in a known data breach.
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Discover and save stories for later.
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MDN Plus
MDN Plus provides a custom user experience for MDN supporters.
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Firefox Focus
Automatic privacy browser and content blocker
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Firefox for Enterprise
Firefox Quantum for businesses
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Thunderbird
Email software for Windows, Mac and Linux
Featured Articles
Compact mode workaround in Firefox
Learn about a workaround to activate compact mode, if you need to. This feature isn't supported and we still recommend using normal mode.
Quick fixes if your Firefox slows down
The article covers the steps you can take to make Firefox run faster.
Manage your extensions using the extensions button in the toolbar
This article describes the new extensions button and how to manage your extensions and their permissions directly from the Firefox toolbar.
Firefox does not work - Common fixes to get you back up and running
Find solutions to Firefox issues like crashing, not starting, slowness and websites not loading.
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Grow and share your expertise with others. Answer questions and improve our knowledge base.