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Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see
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What Windows 10 end of support means for Firefox users
Learn how Firefox will continue supporting Windows 10 after Microsoft ends its updates, and discover the steps Mozilla recommends to keep your browsing experience secure.
Firefox
Firefox
1 week ago
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.
Firefox
Firefox
1 week ago
Firefox support for Windows 7, 8 and 8.1
Firefox version 115 ESR will be the last supported release for Windows 7, 8 and 8.1.
Firefox
Firefox
3/8/26
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”.
Firefox
Firefox
2/26/26
Install Firefox on Linux
This article describes how to download and install Firefox on Linux.
Firefox
Firefox
2 weeks ago
How to download and install Firefox on Mac
This article explains how to download and install Firefox on macOS.
Firefox
Firefox
2/24/26
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.
Firefox
Firefox
10/19/25
Firefox security features warning on Linux
Create an AppArmor profile for Firefox on Linux.
Firefox
Firefox
3/5/25
How to install Firefox on Windows
This article describes how to download and install Firefox on Windows.
Firefox
Firefox
1 week ago
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.
Firefox
Firefox
2 weeks ago
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
Firefox
Firefox
3/8/26
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.
Firefox
Firefox
12/27/24
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.
Firefox
Firefox
5/14/24
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.
Firefox
Firefox
2/22/26
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.
Firefox
Firefox
11/26/23
Run Firefox on ChromeOS
This page explains how to install Firefox on Chromebooks and other devices running ChromeOS.
Firefox
Firefox
2/27/26
I found a fake Firefox update
What to do if you spot fake notices claiming to contain an "urgent" or "critical" Firefox update.
Firefox
Firefox
3 weeks ago
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.
Firefox
Firefox
8/8/25
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.
Firefox
Firefox
1 week ago
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.
Firefox
Firefox
9/24/25
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.
Firefox, Thunderbird
Firefox, Thunderbird
4/2/23
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.
Firefox
Firefox
6/10/25
How the Firefox desktop launcher works
Understand how the Firefox desktop launcher helps restore Firefox after restoring with One Drive.
Firefox
Firefox
1/23/26
Recover user data missing after Firefox update or reinstall
If your bookmarks, passwords, preference settings and other data are missing, it may be available in another Firefox profile. Learn more.
Firefox
Firefox
1 week ago
Importing Safari data into Firefox
Learn now to import data such as bookmarks, browsing history, and custom preferences from your Safari browser into Firefox.
Firefox
Firefox
10/11/25
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.
Firefox, Firefox for Android
Firefox, Firefox for Android
3/18/25
Firefox has ended support for 32-bit Linux
Support for Firefox on 32-bit Linux is ending.
Firefox
Firefox
9/27/25
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.
Firefox
Firefox
5 days ago
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).
Firefox, Firefox for Enterprise
Firefox, Firefox for Enterprise
1/7/26
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.
Firefox
Firefox
9/30/24
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.
Firefox
Firefox
7/14/23
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.
Firefox
Firefox
6 days ago
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.
Firefox
Firefox
6/30/17
Supported platforms and system requirements
Firefox desktop should be installed on systems meeting minimum requirements for best performance.
Firefox, Firefox for Enterprise
Firefox, Firefox for Enterprise
11/6/24
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.
Firefox
Firefox
Created:
6/6/21
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.
Firefox
Firefox
9/25/24
Change your default browser
Learn how to change your default browser on Windows, macOS, and Linux in a few simple steps.
Firefox
Firefox
Created:
10 hours ago
Firefox release notes - What's new and known issues
Links to Firefox release notes for Desktop, Android and iOS.
Firefox, Firefox for Android, Firefox for iOS
Firefox, Firefox for Android, Firefox for iOS
3 weeks ago
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