To install Mozilla Firefox on Windows Server 2016, follow these five steps.
Step 1. Go to the following site.
https://www.mozilla.org/en-US/firefox/new/
Step 2. Download the Firefox Installer.
Step 3. When you are done downloading Firefox, double-click the Firefox Installer .exe file.
Step 4. Ignore the warning.
Step 5. Wait for the installation to finish.