diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index 65758680c8..a042882cfc 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -4581,7 +4581,7 @@ function print_emoji_detection_script() {
 		?>
 		<script type="text/javascript">
 			window._wpemojiSettings = <?php echo wp_json_encode( $settings ); ?>;
-			!function(a,b,c){function d(a){var c,d=b.createElement("canvas"),e=d.getContext&&d.getContext("2d"),f=String.fromCharCode;return e&&e.fillText?(e.textBaseline="top",e.font="600 32px Arial","flag"===a?(e.fillText(f(55356,56806,55356,56826),0,0),d.toDataURL().length>3e3):"diversity"===a?(e.fillText(f(55356,57221),0,0),c=e.getImageData(16,16,1,1).data.toString(),e.fillText(f(55356,57221,55356,57343),0,0),c!==e.getImageData(16,16,1,1).data.toString()):("simple"===a?e.fillText(f(55357,56835),0,0):e.fillText(f(55356,57135),0,0),0!==e.getImageData(16,16,1,1).data[0])):!1}function e(a){var c=b.createElement("script");c.src=a,c.type="text/javascript",b.getElementsByTagName("head")[0].appendChild(c)}var f,g;c.supports={simple:d("simple"),flag:d("flag"),unicode8:d("unicode8"),diversity:d("diversity")},c.DOMReady=!1,c.readyCallback=function(){c.DOMReady=!0},c.supports.simple&&c.supports.flag&&c.supports.unicode8&&c.supports.diversity||(g=function(){c.readyCallback()},b.addEventListener?(b.addEventListener("DOMContentLoaded",g,!1),a.addEventListener("load",g,!1)):(a.attachEvent("onload",g),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),f=c.source||{},f.concatemoji?e(f.concatemoji):f.wpemoji&&f.twemoji&&(e(f.twemoji),e(f.wpemoji)))}(window,document,window._wpemojiSettings);
+			!function(a,b,c){function d(a){var c,d,e,f=b.createElement("canvas"),g=f.getContext&&f.getContext("2d"),h=String.fromCharCode;return g&&g.fillText?(g.textBaseline="top",g.font="600 32px Arial","flag"===a?(g.fillText(h(55356,56806,55356,56826),0,0),f.toDataURL().length>3e3):"diversity"===a?(g.fillText(h(55356,57221),0,0),c=g.getImageData(16,16,1,1).data,g.fillText(h(55356,57221,55356,57343),0,0),c=g.getImageData(16,16,1,1).data,e=c[0]+","+c[1]+","+c[2]+","+c[3],d!==e):("simple"===a?g.fillText(h(55357,56835),0,0):g.fillText(h(55356,57135),0,0),0!==g.getImageData(16,16,1,1).data[0])):!1}function e(a){var c=b.createElement("script");c.src=a,c.type="text/javascript",b.getElementsByTagName("head")[0].appendChild(c)}var f,g;c.supports={simple:d("simple"),flag:d("flag"),unicode8:d("unicode8"),diversity:d("diversity")},c.DOMReady=!1,c.readyCallback=function(){c.DOMReady=!0},c.supports.simple&&c.supports.flag&&c.supports.unicode8&&c.supports.diversity||(g=function(){c.readyCallback()},b.addEventListener?(b.addEventListener("DOMContentLoaded",g,!1),a.addEventListener("load",g,!1)):(a.attachEvent("onload",g),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),f=c.source||{},f.concatemoji?e(f.concatemoji):f.wpemoji&&f.twemoji&&(e(f.twemoji),e(f.wpemoji)))}(window,document,window._wpemojiSettings);
 		</script>
 		<?php
 	}
diff --git a/wp-includes/js/wp-emoji-loader.js b/wp-includes/js/wp-emoji-loader.js
index 83f431cc92..8369623b18 100644
--- a/wp-includes/js/wp-emoji-loader.js
+++ b/wp-includes/js/wp-emoji-loader.js
@@ -14,7 +14,7 @@
 		var canvas = document.createElement( 'canvas' ),
 			context = canvas.getContext && canvas.getContext( '2d' ),
 			stringFromCharCode = String.fromCharCode,
-			tone;
+			tonedata, tone, tone2;
 
 		if ( ! context || ! context.fillText ) {
 			return false;
@@ -47,10 +47,15 @@
 			 * compares if the emoji rendering has changed.
 			 */
 			context.fillText( stringFromCharCode( 55356, 57221 ), 0, 0 );
-			tone = context.getImageData( 16, 16, 1, 1 ).data.toString();
+			tonedata = context.getImageData( 16, 16, 1, 1 ).data;
+
 			context.fillText( stringFromCharCode( 55356, 57221, 55356, 57343 ), 0, 0 );
-			// Chrome has issues comparing arrays, so we compare it as a  string, instead.
-			return tone !== context.getImageData( 16, 16, 1, 1 ).data.toString();
+			// Chrome has issues comparing arrays, and Safari has issues converting arrays to strings.
+			// So, we create our own string and compare that, instead.
+			tonedata = context.getImageData( 16, 16, 1, 1 ).data;
+			tone2 = tonedata[0] + ',' + tonedata[1] + ',' + tonedata[2] + ',' + tonedata[3];
+
+			return tone !== tone2;
 		} else {
 			if ( 'simple' === type ) {
 				/*
diff --git a/wp-includes/js/wp-emoji-loader.min.js b/wp-includes/js/wp-emoji-loader.min.js
index 9579e8f9e4..66188b627c 100644
--- a/wp-includes/js/wp-emoji-loader.min.js
+++ b/wp-includes/js/wp-emoji-loader.min.js
@@ -1 +1 @@
-!function(a,b,c){function d(a){var c,d=b.createElement("canvas"),e=d.getContext&&d.getContext("2d"),f=String.fromCharCode;return e&&e.fillText?(e.textBaseline="top",e.font="600 32px Arial","flag"===a?(e.fillText(f(55356,56806,55356,56826),0,0),d.toDataURL().length>3e3):"diversity"===a?(e.fillText(f(55356,57221),0,0),c=e.getImageData(16,16,1,1).data.toString(),e.fillText(f(55356,57221,55356,57343),0,0),c!==e.getImageData(16,16,1,1).data.toString()):("simple"===a?e.fillText(f(55357,56835),0,0):e.fillText(f(55356,57135),0,0),0!==e.getImageData(16,16,1,1).data[0])):!1}function e(a){var c=b.createElement("script");c.src=a,c.type="text/javascript",b.getElementsByTagName("head")[0].appendChild(c)}var f,g;c.supports={simple:d("simple"),flag:d("flag"),unicode8:d("unicode8"),diversity:d("diversity")},c.DOMReady=!1,c.readyCallback=function(){c.DOMReady=!0},c.supports.simple&&c.supports.flag&&c.supports.unicode8&&c.supports.diversity||(g=function(){c.readyCallback()},b.addEventListener?(b.addEventListener("DOMContentLoaded",g,!1),a.addEventListener("load",g,!1)):(a.attachEvent("onload",g),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),f=c.source||{},f.concatemoji?e(f.concatemoji):f.wpemoji&&f.twemoji&&(e(f.twemoji),e(f.wpemoji)))}(window,document,window._wpemojiSettings);
\ No newline at end of file
+!function(a,b,c){function d(a){var c,d,e,f=b.createElement("canvas"),g=f.getContext&&f.getContext("2d"),h=String.fromCharCode;return g&&g.fillText?(g.textBaseline="top",g.font="600 32px Arial","flag"===a?(g.fillText(h(55356,56806,55356,56826),0,0),f.toDataURL().length>3e3):"diversity"===a?(g.fillText(h(55356,57221),0,0),c=g.getImageData(16,16,1,1).data,g.fillText(h(55356,57221,55356,57343),0,0),c=g.getImageData(16,16,1,1).data,e=c[0]+","+c[1]+","+c[2]+","+c[3],d!==e):("simple"===a?g.fillText(h(55357,56835),0,0):g.fillText(h(55356,57135),0,0),0!==g.getImageData(16,16,1,1).data[0])):!1}function e(a){var c=b.createElement("script");c.src=a,c.type="text/javascript",b.getElementsByTagName("head")[0].appendChild(c)}var f,g;c.supports={simple:d("simple"),flag:d("flag"),unicode8:d("unicode8"),diversity:d("diversity")},c.DOMReady=!1,c.readyCallback=function(){c.DOMReady=!0},c.supports.simple&&c.supports.flag&&c.supports.unicode8&&c.supports.diversity||(g=function(){c.readyCallback()},b.addEventListener?(b.addEventListener("DOMContentLoaded",g,!1),a.addEventListener("load",g,!1)):(a.attachEvent("onload",g),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),f=c.source||{},f.concatemoji?e(f.concatemoji):f.wpemoji&&f.twemoji&&(e(f.twemoji),e(f.wpemoji)))}(window,document,window._wpemojiSettings);
\ No newline at end of file