Firefox automatically updates itself by default but you can always do a manual update. Learn how to update Firefox on Windows, Mac or Linux.
This article describes how to download and install Firefox on Windows.
This article will show you how to install Firefox on Linux.
Firefox stores your personal information and settings in a profile folder. Learn to work with different profiles on Firefox.
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 stores your personal information and settings in a profile folder. Find out what is in your profile and how to locate it.
Downgrading usually doesn't solve Firefox problems. This article gives you links to old versions of Firefox and provides some alternatives to downgrading.
Firefox stores your personal information and settings in a profile folder. Learn how to back up and restore this important data.
If you need to create a new Firefox profile, find out how to recover your old Firefox data such as bookmarks, history and passwords.
This article explains how to download and install Firefox on MacOS.
Firefox and Thunderbird install Mozilla Maintenance Service to allow seamless background updates. Learn how it works and how to disable or remove it.
This page explains how to install Firefox on Chromebooks and other devices running ChromeOS.
This article describes how to remove the Firefox application from your computer and also how to remove the personal information that Firefox stores.
The custom setup option in the Firefox Setup full, offline installer lets you choose the program folder location and shortcuts. Learn more.
Want to switch to the 64-bit version of Firefox? Here's how...
Learn how to enable and disable full disk access on macOS version 10.14 or higher, so that you import Safari browser data into Firefox.