In Chrome, open the page you want, then on the Chrome menu select More Tools / Create Shortcut... Give it a name and check "Open as window". Now you have a sho

In Chrome, open the page you want, then on the Chrome menu select More Tools / Create Shortcut... Give it a name and check "Open as window". Now you have a shortcut you can use like any other application shortcut. (I've only tried this on Windows and Linux, but it should work on macOS too.)