Change default Browser to Chrome

I added a WebViewer Object to a Layout, but when I click the Custom Web Address it always launches the Edge/IE Browser.
How can I change this default, so that it always opens a Chrome Browser?
I tried googling but the online documentation doesn't seem to talk about this possibility, or am I missing something very basic here?
Using FMP15Advanced, Version 15.0.5.500

It will open the default browser. So it's not a Claris FileMaker setting, it's a Microsoft Windows setting that you need to be looking for.