Download, install and migration
Learn how to download Firefox on your desktop devices or move information to and from other browsers.
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 install Firefox on Windows
This article describes how to download and install Firefox on Windows.
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.
Install Firefox on Linux
This article describes how to download and install Firefox on Linux.
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.
Profiles - Where Firefox stores your bookmarks, passwords and other user data
Firefox stores your personal information and settings in a profile folder. Find out what is in your profile and how to locate it.
Recovering important data from an old profile
If you need to create a new Firefox profile, find out how to recover your old Firefox data such as bookmarks, history and passwords.
Back up and restore information in Firefox profiles
Firefox stores your personal information and settings in a profile folder. Learn how to back up and restore this important data.
Profile Manager - Create, remove or switch Firefox profiles
Firefox stores your personal information and settings in a profile folder. Learn to work with different profiles on Firefox.
How to download and install Firefox on Mac
This article explains how to download and install Firefox on a Mac.
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.
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.
Importing Safari data into Firefox
Enable Full Disk Access on macOS version 10.14 (Mojave) or higher, so that you can import data from your Safari browser into Firefox.
Run Firefox on ChromeOS
This page explains how to install Firefox on Chromebooks and other devices running ChromeOS.
Will Firefox version 100 work on Windows 7?
On Windows 7, Microsoft update KB4474419 is needed to successfully install Firefox 100 or above. Learn more.
