Opening a link in an external browser, but not the one set as default

I use Opera as my default browser but use Chrome just as often - I just use two separate browsers for two separate groups of tasks.

If I want to open a URL in Opera, my default browser, it's very simple:

Process.Start("https://www.google.com")

However, what if I want to open a URL in a non-default browser, how can I achieve that?