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Learn how to install your favorite Mozilla products and keep them updated.
Update Firefox to the latest release
Firefox automatically updates itself by default, but you can always do a manual update. Learn how to update Firefox on Windows, Mac, or Linux.
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Windows 10 warns me to use a "Microsoft-verified" app
Windows 10 may interrupt your Firefox install with a "Microsoft-verified apps" warning. Firefox is safe to install, so choose "install anyway".
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Install Firefox on Linux
This article describes how to download and install Firefox on Linux.
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How to install Firefox on Windows
This article describes how to download and install Firefox on Windows.
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Firefox users on Windows 7, 8 and 8.1 moving to Extended Support Release
Firefox version 115 ESR will be the last supported release for Windows 7, 8 and 8.1.
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How to download and install Firefox on Mac
This article explains how to download and install Firefox on macOS.
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Firefox security features warning on Linux
Create an AppArmor profile for Firefox on Linux.
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Find what version of Firefox you are using
Learn how to find out what Firefox version you are using, to help troubleshoot a problem or just to know if Firefox is up to date.
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Back up and restore information in Firefox profiles
Firefox stores your personal data and settings in a profile folder. Learn how to back up and restore this important information.
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Custom installation of Firefox on Windows
The custom setup option in the Firefox full, offline installer lets you choose the program folder location and shortcuts. Learn more.
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Download Firefox on Windows from the Microsoft Store
The "Mozilla Firefox" app is available from the Microsoft Store for Windows 10 and Windows 11. Learn how to install it.
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Firefox users on macOS 10.12, 10.13 and 10.14 moving to Extended Support Release
Firefox version 115 ESR will be the last supported release for macOS 10.12, 10.13 and 10.14
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Firefox has ended support for Windows XP and Vista
Firefox version 52.9.0 ESR was the last supported release for Windows XP and Windows Vista. No further security updates will be provided for those systems.
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Uninstall Firefox from your computer
This article describes how to uninstall the Firefox application from your computer and also how to remove the personal information that Firefox stores.
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Switch from Chrome to Firefox
Firefox can automatically move bookmarks, passwords, history and other preferences from Chrome without deleting it or interfering with any of its settings.
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Run Firefox on ChromeOS
This page explains how to install Firefox on Chromebooks and other devices running ChromeOS.
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Enable background updates on Firefox for Windows when Firefox is not running
On Windows, you can set Firefox to update in the background even when it isn't running, so you always have the latest version. Learn more.
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Install an older version of Firefox
Downgrading to a previous Firefox version doesn't solve most problems. This article links to older versions and provides some alternatives.
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Recover user data missing after Firefox update
If your bookmarks, passwords, preference settings and other data are missing, it may be available in another Firefox profile. Learn more.
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I found a fake Firefox update
What to do if you spot fake notices claiming to contain an "urgent" or "critical" Firefox update.
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Troubleshoot Firefox updates and the Helper tool
Learn what to do if you get a "Firefox is trying to install a new helper tool" message while updating Firefox on macOS.
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Update Firefox to prevent add-ons issues from root certificate expiration
A root certificate that expired March 14, 2025 can cause issues with add-ons, DRM media and essential features, unless you update Firefox.
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Switch to Firefox Extended Support Release (ESR) for personal use
How to switch to Firefox ESR as a workaround for issues with the newest version of Firefox.
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Windows in S mode won't let me install Firefox
You cannot install Firefox from Mozilla or from the Microsoft Store on Windows in S mode. You must first switch out of S mode. Learn more.
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What is the Mozilla Maintenance Service?
Firefox and Thunderbird install Mozilla Maintenance Service to allow seamless background updates. Learn how it works and how to disable or remove it.
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Importing Safari data into Firefox
Import data from your Safari browser into Firefox. You must enable Full Disk Access on macOS version 10.14 (Mojave).
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Solutions for "Can not create temp folder archive" error when installing Firefox (Windows 10)
Stuck with the "Can not create temp folder archive" error on 7-Zip when installing Firefox for Windows 10? This article will help you to solve the issue.
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Why do I get a harmful download message when downloading Firefox on Windows?
You may see a warning that the installer could harm your device when attempting to download Firefox from another browser. Learn more.
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How do I tell if I have the 32-bit or 64-bit Firefox?
Not sure whether you're running 32-bit or 64-bit Firefox on your Windows or Linux computer? This article explains how to find out.
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Firefox Mac OS X 10.9, 10.10 and 10.11 users move to Extended Support Release
Firefox 78 was the last supported version for Mac OS X 10.9, 10.10 and 10.11. Users were moved to Firefox Extended Support Release (ESR).
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Firefox update notifications on Windows
Learn about update notifications on Windows that let you know when a brand-new Firefox version is available, even if Firefox is closed.
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64-bit Firefox crashes with Citrix's XenApp VM
The API hooks from Citrix XenApp 7.13 VDA do not work with 64-bit Firefox. How to find a workaround.
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Supported platforms and system requirements
Firefox desktop should be installed on systems meeting minimum requirements for best performance.
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Resolve “The installation seems to be incomplete/corrupt” error in Firefox on Windows
Fix the “installation incomplete/corrupt” error in Firefox on Windows by addressing common causes like corrupted files or hardware issues.
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Firefox release notes - What's new and known issues
Links to Firefox release notes for Desktop, Android and iOS.
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