The installation process may take a few minutes to complete. Here's what you can expect:
Now that you've decided to give Mozilla Firefox a try, follow these steps to download and install it on your Windows 8.1 64-bit system: mozilla firefox download windows 8.1 64 bit
If you are still running Windows 8.1 (64-bit), you can continue using the latest version of Mozilla Firefox. Mozilla remains one of the few major browsers that still supports Windows 8.1 with security updates and new features. Follow the steps below to download the correct 64-bit installer. The installation process may take a few minutes to complete