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 download and install Firefox on Windows
This article describes how to download and install Firefox on Windows.
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 Firefox on Linux
This article will show you how to install Firefox on Linux.
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.
Run Firefox on ChromeOS
This page explains how to install Firefox on Chromebooks and other devices running ChromeOS.
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.
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.
Custom installation of Firefox on Windows
The custom setup option in the Firefox Setup full, offline installer lets you choose the program folder location and shortcuts. Learn more.
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.
Install an older version of Firefox
Downgrading to an older Firefox version doesn't solve most problems. This article links to older versions and provides some alternatives.
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.
How to switch from 32-bit to 64-bit Firefox
Want to switch to the 64-bit version of Firefox? Here's how...
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.
Upgrading to the new version of Firefox (84+) on Apple Silicon
How to make sure you're using the Apple Silicon version of Firefox.
