Bootstrap icon favorite and subscribe

It requires firmasite plugin for font-awesome icons:

/* 
 * This action adds icons to Favorite and Subscribe buttons on bbPress
 */
add_action( 'wp_footer', "firmasite_social_subscription_icons");
function firmasite_social_subscription_icons(){ ?>
<script type="text/javascript">
(function ($) {
	$(document).ready(function() {
		firmasite_social_subscription_icon();	
		firmasite_social_favorite_icon();
	});
	$("#subscription-toggle").on("DOMNodeInserted", function(){
		firmasite_social_subscription_icon();
    });
	$("#favorite-toggle").on("DOMNodeInserted", function(){
		firmasite_social_favorite_icon();
    });	
	function firmasite_social_subscription_icon(){
		// Removing bad looking &nbsp;|&nbsp; section
		if($('#subscription-toggle').length>0){
			$('#subscription-toggle').get(0).firstChild.nodeValue = "";
		}

		if($("#subscription-toggle i").length == 0){
			$("#subscription-toggle span").prepend('<i></i>');			
		} 
		if ($("#subscription-toggle span").hasClass("is-subscribed")){	
			$("#subscription-toggle i").removeClass('icon-envelope').addClass('icon-envelope-alt');
		} else {
			$("#subscription-toggle i").removeClass('icon-envelope-alt').addClass('icon-envelope');
		}				
	}
	function firmasite_social_favorite_icon(){
		if($("#favorite-toggle i").length == 0){
			$("#favorite-toggle span").prepend('<i></i>');			
		} 
		if ($("#favorite-toggle span").hasClass("is-favorite")){	
			$("#favorite-toggle i").removeClass('icon-star-empty').addClass('icon-star');
		} else {
			$("#favorite-toggle i").removeClass('icon-star').addClass('icon-star-empty');
		}
	}
})(jQuery);	
</script>
<?php
}

np.. meanwhile this is new bbpress feature.. threaded comment example!