Opening a web page in a new tab via Javascript button

[admin]

Set additional class to customlink, add this code to Custom JavaScript and modify the URL as needed:

Code:

$(function(){
  $('.customlink').off('vclick').on('vclick', function() {
    window.open('https://openrb.com');
  });
});

If you need several links like this then you will need to use different class names for each one and make a copy of the JS code.