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How to install Firefox and keep it up to date

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.

How to download and install Firefox on Windows

This article describes how to download and install Firefox on Windows.

How to download and install Firefox on Mac

This article explains how to download and install Firefox on a Mac.

Firefox has ended support for Windows XP and Vista

Firefox version esr was the last supported release for Windows XP and Windows Vista. No further security updates will be provided for those systems.

Install Firefox on Linux

This article will show you how to install Firefox on Linux.

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.

Install an older version of Firefox

Downgrading usually doesn't solve Firefox problems. This article gives you links to old versions of Firefox and provides some alternatives to downgrading.

Windows 10 warns me to use a "Microsoft-verified" app

Windows 10 may interrupt your Firefox install with a warning about "Microsoft-verified apps". Firefox is safe to install and use, so choose "install anyway".

Firefox Mac OS X , and users move to Extended Support Release

Firefox 78 is the last supported version for Mac OS X , and Users will be moved to Firefox Extended Support Release (ESR).

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.

Uninstall Firefox from your computer

This article describes how to remove the Firefox application from your computer and also how to remove the personal information that Firefox stores.

Firefox support has ended for Mac OS X , and

Firefox version 49 and above are no longer supported on Mac OS X , and Learn more about your options.

Windows 10 S won't let me install Firefox

Windows 10 S Mode can only run applications downloaded from the Windows Store.

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.

I found a fake Firefox update

What to do if you spot fake notices claiming to contain an "urgent" or "critical" Firefox update.

How do I tell if I have the bit or bit Firefox?

Not sure whether you're running bit or bit Firefox? This article explains how to find out.

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.

Firefox release notes - What's new and known issues

Links to release notes for Firefox and Firefox for Android.