Browser compatibility check ... disable feature on specific browsers.

site__function__browser_compat_check.php

<?php

function detect_browser() {
	$arr_browsers = ["Opera", "Edge", "Chrome", "Safari", "Firefox", "MSIE", "Trident"]; 
	$agent = $_SERVER['HTTP_USER_AGENT'];
	$user_browser = '';
	foreach ($arr_browsers as $browser) {
		if (strpos($agent, $browser) !== false) {
			$user_browser = $browser;
			break;
		}   
	}
	return $user_browser;
}


function disable_something() {
	echo '
	<script>
	jQuery(document).ready(function($){
	$( "#something_id" ).css({display:"none"});
	alert("SOMETHING is not supported on your browser, please use Chrome, Firefox, Opera or Safari.");
	});
	</script>';
}


function not_on_ie(){
	if ( 
	detect_browser() == 'Edge' || 
	detect_browser() == 'MSIE' || 
	detect_browser() == 'Trident'
	) :
		add_action('wp_footer', 'disable_something');
	endif;
}
add_filter( 'wp_head', 'not_on_ie' );



?>