
When the installation is complete, Firefox will open.If this dialog appears, click to start the installation.
The User Account Control dialog may open, to ask you to allow the Firefox Installer to make changes to your computer. Note: If you see an Open File - Security Warning dialog, click or. In other browsers, you may need to first save the Firefox installer to your computer, then open the file you downloaded. Click Open file on Microsoft Edge or on Internet Explorer, to start the process. If you use Microsoft Edge or Internet Explorer, a notification bar will appear at the bottom of the page with an option to open or run the Firefox Installer file. Previous versions of the operating system shouldn't be a problem with Windows 8, Windows 7 and Windows Vista having been tested. What version of Windows can iCloud run on iCloud can be used on a computer running Windows 11 or Windows 10. The Firefox Installer that downloads will automatically offer you the best available version of Firefox for your computer. Download and installation of this PC software is free and 7.21.0.23 is the latest version last time we checked. Visit this Firefox download page in any browser, such as Microsoft Internet Explorer or Microsoft Edge.
For more information, see Microsoft's support article How to determine your user account type in Windows. Do not install Firefox using a limited Windows XP account.