Disable Modal Window After Initial Page Load ?

This code displays the Welcome modal window on page load on the Landing page, and also when the page is refreshed.

The Visitor only needs to see it once as they navigate the site and return back to the Landing page.

What's the code to have it viewed just once for the Visitor?

</noscript>
<script>
    $('#welcomeModal').modal('show');
	$("#file-3").fileinput({
		browseClass: "btn btn-warning  ",
		showUpload: true,
		showRemove: false,
		showCaption: false,
		
		fileType: "any"
	});
    $(".btn-warning").on('click', function() {
        if ($('#file-4').attr('disabled')) {
            $('#file-4').fileinput('enable');
        } else {
            $('#file-4').fileinput('disable');
        }
    });

	</script>
<noscript>

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modal12.PNG