Installation and updates
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.
Last updated: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”.
Last updated:Install Firefox on Linux
This article describes how to download and install Firefox on Linux.
Last updated: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.
Last updated: 1 week agoHow to install Firefox on Windows
This article describes how to download and install Firefox on Windows.
Last updated: 1 week agoMove Thunderbird data to a new computer
How to move Thunderbird data (accounts, messages, passwords) to a new computer.
Last updated:End of support for Firefox on Amazon Devices
Learn more about the end of support for Firefox on Amazon Fire TV and Echo Show.
Last updated:Firefox security features warning on Linux
Create an AppArmor profile for Firefox on Linux.
Last updated: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.
Last updated:How to download and install Firefox on Mac
This article explains how to download and install Firefox on macOS.
Last updated: 1 week agoProfiles - Where Thunderbird stores your messages and other user data
Thunderbird saves personal information such as messages, passwords and user preferences in a set of files called a "profile".
Last updated: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.
Last updated: 1 week agoCustom 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.
Last updated: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.
Last updated: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.
Last updated:Update Thunderbird to the latest version
Thunderbird automatically updates itself by default but you can always do a manual update. Learn how to update Thunderbird.
Last updated: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.
Last updated:Update to the latest version of Firefox for Android
This article shows you how to update to the latest version of Firefox for Android, so you can use all the newest features.
Last updated: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.
Last updated:Install Thunderbird on Windows
This article describes how to install Thunderbird on Windows.
Last updated:Install Thunderbird on Linux
This article will show you how to install Thunderbird on Linux.
Last updated:How to install Mozilla VPN on a Linux computer
Download and install Mozilla VPN to connect to the internet through one of our secure servers, keeping your location and online activity private.
Last updated:Install Firefox on your phone or tablet
Firefox is available on iOS and Android devices. Learn how to install it on your phone or tablet.
Last updated:Deploy Firefox with MSI installers
Firefox Enterprise offers MSI installers to help system administrators customize and deploy Firefox in their environments.
Last updated:Manage Firefox updates
Learn about automatic updates for Firefox deployments and how to ensure that the latest security patches are applied and all features are available.
Last updated:Run Firefox on ChromeOS
This page explains how to install Firefox on Chromebooks and other devices running ChromeOS.
Last updated:How to select a Thunderbird release channel
How to determine which Thunderbird release channel(s) to use: ESR, Release, Beta or Daily
Last updated: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.
Last updated:I found a fake Firefox update
What to do if you spot fake notices claiming to contain an "urgent" or "critical" Firefox update.
Last updated:Import settings and data into Thunderbird for Android
How to import email settings from K-9 and Thunderbird for Android
Last updated: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.
Last updated:Download and install Mozilla VPN on Windows
Download and install Mozilla VPN to connect to the internet through one of our secure servers, keeping your location and online activity private.
Last updated: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.
Last updated: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.
Last updated:Thunderbird Release
Stable Thunderbird release that gets frequent new features, improvements, bug fixes and security patches.
Last updated:Installing an Add-on in Thunderbird
Add-ons add functionality to Thunderbird or change its appearance. Learn how to install add-ons to Thunderbird.
Last updated: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
Last updated: 1 week agoTroubleshoot 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.
Last updated: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.
Last updated:Switching to Thunderbird
This article explains how you can switch to Thunderbird from your current mail application, such as Windows Mail, Outlook or also Mail on Mac OS and Evolution on Linux.
Last updated:Choose a Firefox update channel
How to choose between rapid release and extended support release (ESR).
Last updated:How to add devices to your Mozilla VPN subscription
A subscription to Mozilla VPN lets you install the application on up to five devices. Learn how to add and remove devices after installing the app.
Last updated:Firefox ESR release cycle
Firefox offers an Extended Support Release (ESR) based on a regular release of Firefox for desktop for use by organizations. Learn more.
Last updated:Deploy Firefox on macOS using PKG and Jamf
Learn how to deploy Firefox on macOS using pkg and Jamf
Last updated: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.
Last updated: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.
Last updated:How to enable Always-on VPN on Android
Enable “Always-on VPN” on Android to encrypt your connection automatically every time you browse the Internet on your phone.
Last updated:Automatically launch Mozilla VPN when your device starts
Follow the steps in this article to automatically launch Mozilla VPN every time you start your device.
Last updated: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.
Last updated:Thunderbird for Android 8 FAQ
Frequently asked Questions for Thunderbird for Android version 8
Last updated:Getting started with Thunderbird for Android
How to start using Thunderbird for Android.
Created:Is Firefox available for iPhone or iPad in my language?
Firefox is available on iPhone, iPad and iPod touch devices in some countries, with more on the way.
Last updated:Install Firefox on your iPad, iPhone or iPod
Learn how to install Firefox on your iPhone, iPad and iPod running iOS 15.0 and up.
Last updated:Thunderbird Beta
Test new features and fixes in the most stable pre-release build of Thunderbird.
Last updated:How to silently install/uninstall Firefox for Enterprise
Learn how to silently install and uninstall Firefox.
Last updated:End of support for Firefox Lockwise
Mozilla ended support for the Firefox Lockwise app on Android and iOS, effective December 13, 2021, and integrated its functionality into Firefox mobile.
Last updated:Thunderbird ESR
Stable Thunderbird Extended Support Release (ESR) for desktop for use by organizations, that gets regular release of major bug fixes and security patches, but infrequent new features and improvements.
Last updated:Install Firefox on an Android device using Google Play
This article shows you how to download and install Firefox for Android on your Android device.
Last updated:Uninstall Thunderbird from your computer
This article will explain how to uninstall Thunderbird from your computer
Last updated:Uninstall Firefox for iOS
If Firefox isn't for you, uninstalling it from your iOS device only takes a few seconds.
Last updated:Find what version of Thunderbird you are using
Learn how to find out what Thunderbird version you are using, to help troubleshoot a problem or just to know if Thunderbird is up to date.
Last updated:Best practices for installing and updating Firefox
Disable automatic updates through the DisableAppUpdate policy, and get Firefox beta builds to test features in your environment before deployment.
Last updated:Download Mozilla VPN on your desktop or mobile device
How to download and install Mozilla VPN on your desktop or mobile device.
Last updated: 1 week agoHow do I choose my server on Mozilla VPN?
How to choose from servers in 30+ countries on your Windows, macOS, Linux, Android or iOS device.
Last updated:Importing Safari data into Firefox
Learn now to import data such as bookmarks, browsing history, and custom preferences from your Safari browser into Firefox.
Last updated:How do I update Mozilla VPN?
Learn how to keep Mozilla VPN up to date to get the latest features.
Last updated:Uninstall Firefox for Android
Learn how to uninstall/remove Firefox for Android from your device.
Last updated:Which version of Firefox am I using?
Find out what version of Firefox you're using on your iPad, iPhone or iPod.
Last updated:How can I get the latest version of Thunderbird on Windows XP or Vista?
How to update to the latest version of Thunderbird on Windows XP and Vista.
Last updated:Deploy Firefox with extensions
Deploy Firefox in your environment with preinstalled add-ons.
Last updated:Choosing a Firefox CPU architecture for Windows OS
On both ESR and rapid release channels we offer Firefox builds for both 32 and 64 bit CPU architecture.
Last updated:Test versions of Firefox for your organization
Test future versions of Firefox before they are released to the public by downloading Firefox Beta, or Nightly.
Last updated:Dedicated profile per Thunderbird installation
Different Thunderbird installations need separate profiles. Learn more.
Last updated: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).
Last updated:Recover user data missing after Thunderbird update
If your messages, addresses, passwords, preference settings and other data are missing, it may be available in another Thunderbird profile. Learn more.
Last updated: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.
Created:How do I uninstall Mozilla VPN?
This article describes the steps to uninstall Mozilla VPN from your device.
Last updated:Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication
Thunderbird 91.8.0, released 5th April 2022, converts Gmail accounts to OAuth 2.0 in compliance with Google's schedule for requiring this login method.
Last updated:Download and install Mozilla VPN on iOS
Download and install Mozilla VPN to connect to the internet through one of our secure servers, keeping your location and online activity private.
Last updated:How to download and install Mozilla VPN on macOS
Download and install Mozilla VPN to connect to the internet through one of our secure servers, keeping your location and online activity private.
Last updated: 1 week agoThunderbird 115 Supernova FAQ
This document answers questions for new users of Thunderbird 115 Supernova, in particular users who have upgraded from a previous version.
Last updated:Well known sources for downloading the Thunderbird email software
This page lists the recommended ways to obtain Mozilla Thunderbird.
Last updated:Verify a Mozilla Thunderbird installation package
This article explains how to verify a Thunderbird installation package that was downloaded from thunderbird.net or archive.mozilla.org
Last updated:New in Thunderbird 128 Nebula
Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 128.0 Nebula.
Last updated:Thunderbird 128 Nebula FAQ
This document answers questions for new users of Thunderbird 128 Nebula, in particular users who have upgraded from a previous version.
Last updated: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.
Last updated:New in Thunderbird for Android version 8
Introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird for Android version 8.
Last updated:Get started with Firefox 141 for iOS
Learn about new features in Firefox for iOS version 141, including setup tips, personalization and default browser settings.
Last updated:How the Firefox desktop launcher works
Understand how the Firefox desktop launcher helps restore Firefox after restoring with One Drive.
Last updated: 3 weeks agoFirefox has ended support for 32-bit Linux
Support for Firefox on 32-bit Linux is ending.
Last updated:Getting Started with Thunderbird Pro
How to get started with Thunderbird Pro which currently includes: Thundermail, Send and Appointment.
Last updated: 1 week agoDownload and install Firefox for Android
Use these articles to determine if you can download and install Firefox on your mobile device.
Last updated:Thunderbird Software Update Failed
This article presents possible solutions to this problem and workarounds to get Thunderbird updated.
Last updated:Install Thunderbird on Mac
This article describes how to install Thunderbird on Mac OS.
Last updated:How do I move my Thunderbird data to a new computer?
Created:Installing Ubuntu on Ubuntu Linux
Created:Moving Thunderbird Data to a New Computer Redirect 1
Created:Installing Thunderbird on Ubuntu Linux
Created:Firefox is no longer available for download in the T-Store
Firefox for Android is no longer available for download in the T-Store in South Korea. You can still download it and receive updates from Google Play.
Last updated: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.
Last updated:Your hardware is no longer supported by Thunderbird
On computers with processors older than Pentium 4, Thunderbird is no longer supported as of version 52.
Created: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.
Last updated:Thunderbird support has ended for Mac OS X 10.6, 10.7 and 10.8
Thunderbird version 52 and above are no longer supported on Mac OS X 10.6, 10.7 and 10.8. Learn more about your options.
Last updated:Thunderbird end of Support for XP and Vista
Support for Windows XP and Vista has ended.
Last updated:Repackage the Windows installer
Sometimes you might need to include changes you've made to Firefox in a new installer. This document shows how to do that.
Last updated:Deploy Firefox customizations on macOS
How to run customizations on Mac.
Last updated:Supported platforms and system requirements
Firefox desktop should be installed on systems meeting minimum requirements for best performance.
Last updated:Deploy Firefox on Windows
How to deploy Firefox for Enterprise on Windows devices.
Last updated:Setting Up Roaming Users Profiles
Learn how to set up a roaming user profile on Firefox Enterprise.
Created:Is Mozilla VPN compatible with my device?
Mozilla VPN is available for desktop, tablet and mobile devices and compatible with Windows 10 and 11, macOS, Linux, Android and iOS.
Last updated: 1 week agoWhat's new in Firefox for Android 79
See what the latest version of Firefox for Android includes.
Last updated:Managing Thunderbird Updates
Learn about automatic updates for Thunderbird deployments and how to ensure that the latest security patches are applied and all features are available.
Last updated:Firefox for Android (68 and earlier) end of support
Old versions of Firefox for Android will no longer receive security and performance updates. Please get the latest version of Firefox for Android.
Last updated:What's new in Firefox for iOS (version 34)
See what's included in Firefox for iOS 34.
Created:Deploy Firefox with language packs
Deploy Firefox in your environment with preinstalled language packs.
Last updated:What's new in Firefox for iOS (version 35)
See what's new in the latest release.
Created:What's new in Firefox for iOS (version 36)
See what's new in the latest release.
Last updated:What's new in Firefox for iOS (version 37)
See what's new in the latest release.
Created:What's new in Firefox for iOS (version 38)
See what's new in the latest release.
Created:What's new in Firefox for iOS (version 39)
Learn more about the improvements and features for Version 39 of Firefox for iOS.
Last updated:What to do after you have subscribed to Mozilla VPN
Learn what to do after you have paid for a Mozilla VPN subscription.
Last updated:Download the Beta and Nightly versions of Firefox Focus for Android
You can download the Beta and Nightly versions of Firefox Focus for Android to your mobile device.
Created:What's new in Firefox for iOS (version 40)
Welcome to version 40 of Firefox for iOS.
Last updated:What's new in Firefox for iOS (version 96)
See what's new in the latest release of Firefox for iOS (version 96).
Last updated:What's new in Firefox for iOS (version 97)
See what's new in the latest release of Firefox for iOS (version 97).
Last updated:What's new in Firefox for iOS (version 98)
See what's new in the latest release of Firefox for iOS (version 98).
Last updated:What's new in Firefox for iOS (version 99)
See what's new in the latest release of Firefox for iOS (version 99).
Last updated:What's new in Firefox for iOS (version 100)
See what's new in the latest release of Firefox for iOS (version 100).
Last updated:New in Thunderbird 102
Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 102.0.
Last updated:Custom installation of Thunderbird on Windows
The custom setup option in the Thunderbird full, offline installer lets you choose the Windows program folder location and shortcuts. Learn more.
Last updated:What's new in Firefox for iOS (version 101)
See what's new in the latest release of Firefox for iOS (version 101).
Last updated:What's new in Firefox for iOS (version 102)
See what's new in the latest release of Firefox for iOS (version 102).
Created:What's new in Firefox for iOS (version 103)
See what's new in the latest release of Firefox for iOS (version 103).
Last updated:What's new in Firefox for iOS (version 104)
See what's new in the latest release of Firefox for iOS (version 104).
Created:What's new in Firefox for iOS (version 105)
See what's new in the latest release of Firefox for iOS (version 105).
Created:What's new in Firefox for iOS (version 106)
See what's new in the latest release of Firefox for iOS (version 106).
Last updated:What's new in Firefox for iOS (version 107)
See what's new in the latest release of Firefox for iOS (version 107).
Last updated:What's new in Firefox for iOS (version 108)
See what's new in the latest release of Firefox for iOS (version 108).
Last updated:What's new in Firefox for iOS (version 109)
See what's new in the latest release of Firefox for iOS (version 109).
Last updated:What's New in Firefox Focus for iOS
See what's new in the latest release of Firefox Focus for iOS.
Last updated:Upgrading from an older version of Thunderbird
This article will help you upgrade old versions of Thunderbird to the latest version.
Last updated: 1 week agoHow to download and install Mozilla VPN on Android
Download and install Mozilla VPN to connect to the internet through one of our secure servers, keeping your location and online activity private.
Last updated: 1 week agoWhat's new in Firefox for iOS (version 111)
See what's new in the latest release of Firefox for iOS (version 111).
Created:What's New in Firefox Klar for iOS
See what's new in the latest release of Firefox Klar for iOS.
Created:New in Thunderbird 115 Supernova
Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 115.0 Supernova.
Last updated: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.
Last updated:Thunderbird Daily
Test new features and fixes in the least stable channel of Thunderbird. This is where development and testing begin, and new features are developed.
Last updated:Thunderbird release notes - What's new and known issues
Links to Thunderbird release notes for Desktop and Android.
Last updated:New in Thunderbird Desktop
Detailed introduction to interesting new features, improvements, and changes visible to users in Thunderbird Release for Desktop (Windows, macOS and Linux).
Last updated:New in Thunderbird for Android
Detailed introduction to interesting new features, improvements, and changes visible to users in Thunderbird for Android monthly releases.
Last updated: 1 week agoFirefox Support for Organizations
A dedicated enterprise-level offering for organizations who need private issue triage and close collaboration with Mozilla's engineering and product teams.
Created:Install the Thunderbird Pro Add-on in Thunderbird Desktop
How to install the Thunderbird Pro add in Thunderbird Desktop
Last updated: 1 week agoWill Firefox work on my mobile device?
This article lists mobile devices that you can install Firefox on.
Last updated:Set Firefox as your default browser on Android
This article explains how to set Firefox as your default browser on your Android device.
Last updated:Firefox release notes - What's new and known issues
Links to Firefox release notes for Desktop, Android and iOS.
Last updated:
Volunteer
Grow and share your expertise with others. Answer questions and improve our knowledge base.