Then, in your form's Features section, under Destination choose Send to Make and follow the instructions in the blue box. Fill in the Webhooks response action in Make so that the Body contains {"redirect": "https://google.com"}, substituting your destination URL for https://google.com.
You don't need to supply all these override values, just the ones you want to change from the default values.
What It Does
After the form is successfully submitted to Make, the script looks at the response body, gets the value for redirect (or whatever property name you have specified), and then navigates the browser to that string as a URL.