Since JNLP files are simply Java Web Start files that open applications through an Internet browser, any browser that works in Windows 8.1 will open a JNLP file as long as you have Java installed.

Windows/Linux: If you've downloaded or received a file with an extension you don't recognize (or with no extension at all), TrID can analyze it and tell you what programs can open it. We've talked ...

When you double-click on a file in Windows, it will automatically open a default program that is configured to manage these types of files. It is common, though, want or need to use a different ...