How to open link in external browser instead of in-app (instagram)?

You can add this script to head to redirect to chrome:

<script>

        var userAgent = navigator.userAgent || navigator.vendor || window.opera;

        var str = navigator.userAgent;

        var instagram = str.indexOf("Instagram");

        var facebook = str.indexOf("FB");

        if (/android/i.test(userAgent) && (instagram != -1 || facebook != -1) ) {

            document.write("<a target=\"_blank\" href=\"https://yourdomain.com\" download id=\"open-browser-url\">Please wait. Proceed to Chrome</a>");

            window.stop();

            let input = document.getElementById('open-browser-url');

            if (input) {

                input.click();

            }

        }

    </script>