This article explains how to install Firefox on Windows, either with a simple online installer from Mozilla or from the Microsoft Store.

• If you need a full, offline installer with custom options, see Custom installation of Firefox on Windows.
• To update Firefox from a previous version, see Update Firefox to the latest release.

Install from Mozilla's download server

To install Firefox on your computer:

1. Visit this Firefox download page in any browser, such as Microsoft Edge.
2. Click the Download Now button. The Firefox Installer that downloads will automatically offer you the best available version of Firefox for your computer.
   
   Windows 10 may show you a warning when installing apps that aren't from the Microsoft Store. See Windows 10 warns me to use a "Microsoft-verified" app for more information.
   • Click Open file in the Downloads notification on Microsoft Edge to start the process.
   • In other browsers, you may need to first save the Firefox installer to your computer, then open the file you downloaded.
     Note: If you see an Open File – Security Warning dialog, click Open or Run.

   

3. The User Account Control dialog may open, to ask you to allow the Firefox Installer to make changes to your computer. If this dialog appears, click Yes to start the installation. Firefox will be installed to the Program Files directory and available to all users on your computer.

   

   Note: If you run the installer as administrator and click No or cancel the UAC dialog, or if you install Firefox using a non-administrator account, Firefox installs to your user home directory (C:\Users\<username>\AppData\Local\Mozilla Firefox\) and is not available to other users.

4. Wait for Firefox to finish installing.

   

5. When the installation is complete, the Welcome to Firefox page will open, where you can read the Terms of Use and Privacy Notice and manage diagnostic and interaction data.

   

   Note: A notification bar with a Refresh Firefox… button may be shown at the top of the page, if Firefox was previously installed. See Refresh Firefox - reset add-ons and settings to learn more.

6. Click the Continue button, then complete or skip the steps that follow.

Congratulations, you are done installing Firefox!

Double-click the Firefox icon that was placed on the desktop whenever you want to start Firefox.

Install from the Microsoft Store

1. Click on the Windows icon located on the taskbar.
2. Type Microsoft Store.
3. Select the Microsoft Store from the results. This will take you to the Microsoft app store.
4. Type Firefox in the search bar and press Enter.
5. Select Mozilla Firefox from the applications available.
6. Click Get to start the installation process.

To learn more, see Download Firefox on Windows from the Microsoft Store.

Having problems?

Here are some articles that can help you:

• Make Firefox your default browser
• Firefox won't start - find solutions
• Troubleshoot and diagnose Firefox problems
• Why do I get a harmful download message when downloading Firefox on Windows?

If you need more help, you can always get community support.