diff --git a/Gruntfile.js b/Gruntfile.js
index b8dd5f8..29173b4 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -233,7 +233,8 @@ module.exports = function(grunt) {
 
 					// Exceptions
 					'!wp-includes/css/dashicons.css',
-					'!wp-includes/css/wp-oembed-embed.css'
+					'!wp-includes/css/wp-oembed-embed.css',
+					'!wp-includes/css/wp-oembed-embed-ie.css'
 				]
 			},
 			colors: {
diff --git a/src/wp-includes/css/wp-oembed-embed-ie.css b/src/wp-includes/css/wp-oembed-embed-ie.css
new file mode 100644
index 0000000..dca8c07
--- /dev/null
+++ b/src/wp-includes/css/wp-oembed-embed-ie.css
@@ -0,0 +1,38 @@
+/* Dashicons */
+.dashicons {
+	*display: inline;
+	*zoom: 1;
+}
+
+.dashicons-no {
+	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAQAAAAngNWGAAAAcElEQVR4AdXRVxmEMBAGwJMQCUhAIhKQECmRsFJwMFfp7HfP/E8pk0173CuKpt/0R+WaBaaZqogLagBMuh+DdoKbyRCwqZ/SnM0R5oQuZ2UHS8Z6k23qPxZCTrV5UlHMi8bsfHVXP7K/GXZHaTO7S54CWLdHlN2YIwAAAABJRU5ErkJggg==);
+	*background-image: url(../images/embed/close.png);
+}
+
+.dashicons-admin-comments {
+	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAATUlEQVR4AWMYWqCpvUcAiA8A8X9iMFStAD4DG0AKScQNVDZw1MBRAwvIMLCA5jmFlCD4AMQGlOTtBgoNwzQQ3TCKDaTcMMxYN2AYVgAAYPKsEBxN0PIAAAAASUVORK5CYII=);
+	*background-image: url(../images/embed/comment.png);
+	*background-position: 0 0;
+}
+
+.wp-embed-comments a:hover .dashicons-admin-comments {
+	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAATElEQVR4AWMYYqB4lQAQHwDi/8RgqFoBfAY2gBSSiBuobOCogaMGFpBhYAEdcwrhIPgAxAaU5O0GCg3DNBDdMIoNpNwwzFg3YBhWAABG71qAFYcFqgAAAABJRU5ErkJggg==);
+	*background-image: url(../images/embed/comment.png);
+	*background-position: 0 -40px;
+}
+
+.dashicons-share {
+	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAc0lEQVR4AWMYfqCpvccAiBcA8X8gfgDEBZQaeAFkGBoOoMR1/7HgDeQa2ECZgQiDHID4AMwAor0MCmBoQP+HBnwAskFQdgBRkQJViGk7wiAHUr21AYdhDTA1dDOQHl6mPFLokmwoT9j0z3qUFw70L77oDwAiuzCIub1XpQAAAABJRU5ErkJggg==);
+	*background-image: url(../images/embed/share.png);
+	*background-position: 0 0;
+}
+
+.wp-embed-share-dialog-open:hover .dashicons-share {
+	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAc0lEQVR4AWMYhqB4lQEQLwDi/0D8AIgLKDXwAsgwNBxAiev+Y8EbyDWwgTIDEQY5APEBmAFEexkUwNCA/g8N+ABkg6DsAKIiBaoQ03aEQQ6kemsDDsMaYEroZiA9vEx5pNAl2VCesOmf9SgvHOhffNEfAAAMqPR5IEZH5wAAAABJRU5ErkJggg==);
+	*background-image: url(../images/embed/share.png);
+	*background-position: 0 -40px;
+}
+
+.wp-embed-share-dialog {
+	*background-color: #222;
+}
\ No newline at end of file
diff --git a/src/wp-includes/css/wp-oembed-embed.css b/src/wp-includes/css/wp-oembed-embed.css
index 9ea586b..0e85aae 100644
--- a/src/wp-includes/css/wp-oembed-embed.css
+++ b/src/wp-includes/css/wp-oembed-embed.css
@@ -19,6 +19,8 @@ body {
 /* Dashicons */
 .dashicons {
 	display: inline-block;
+	*display: inline;
+	*zoom: 1;
 	width: 20px;
 	height: 20px;
 	background-color: transparent;
@@ -48,6 +50,10 @@ body {
 	background-image: url("data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2020%2020%27%3E%3Cpath%20d%3D%27M14.5%2012q1.24%200%202.12.88T17.5%2015t-.88%202.12-2.12.88-2.12-.88T11.5%2015q0-.34.09-.69l-4.38-2.3Q6.32%2013%205%2013q-1.24%200-2.12-.88T2%2010t.88-2.12T5%207q1.3%200%202.21.99l4.38-2.3q-.09-.35-.09-.69%200-1.24.88-2.12T14.5%202t2.12.88T17.5%205t-.88%202.12T14.5%208q-1.3%200-2.21-.99l-4.38%202.3Q8%209.66%208%2010t-.09.69l4.38%202.3q.89-.99%202.21-.99z%27%20fill%3D%27%2382878c%27%2F%3E%3C%2Fsvg%3E");
 }
 
+.no-js .dashicons-share {
+	display: none;
+}
+
 .wp-embed-share-dialog-open:hover .dashicons-share {
 	background-image: url("data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2020%2020%27%3E%3Cpath%20d%3D%27M14.5%2012q1.24%200%202.12.88T17.5%2015t-.88%202.12-2.12.88-2.12-.88T11.5%2015q0-.34.09-.69l-4.38-2.3Q6.32%2013%205%2013q-1.24%200-2.12-.88T2%2010t.88-2.12T5%207q1.3%200%202.21.99l4.38-2.3q-.09-.35-.09-.69%200-1.24.88-2.12T14.5%202t2.12.88T17.5%205t-.88%202.12T14.5%208q-1.3%200-2.21-.99l-4.38%202.3Q8%209.66%208%2010t-.09.69l4.38%202.3q.89-.99%202.21-.99z%27%20fill%3D%27%230073aa%27%2F%3E%3C%2Fsvg%3E");
 }
@@ -139,12 +145,16 @@ p.wp-embed-heading {
 .wp-embed-site-title a {
 	position: relative;
 	display: inline-block;
+	*display: inline;
+	*zoom: 1;
 	padding-left: 35px;
 }
 
 .wp-embed-site-title,
 .wp-embed-meta {
 	display: table-cell;
+	*display: inline;
+	*zoom: 1;
 }
 
 .wp-embed-meta {
@@ -156,6 +166,7 @@ p.wp-embed-heading {
 .wp-embed-comments,
 .wp-embed-share {
 	display: inline;
+	*zoom: 1;
 }
 
 .wp-embed-meta a:hover {
@@ -166,6 +177,8 @@ p.wp-embed-heading {
 .wp-embed-comments a {
 	line-height: 25px;
 	display: inline-block;
+	*display: inline;
+	*zoom: 1;
 }
 
 .wp-embed-comments + .wp-embed-share {
@@ -178,6 +191,7 @@ p.wp-embed-heading {
 	left: 0;
 	right: 0;
 	bottom: 0;
+	background-color: #222;
 	background-color: rgba(10, 10, 10, 0.9);
 	color: #fff;
 	opacity: 1;
@@ -254,7 +268,9 @@ p.wp-embed-heading {
 }
 
 .wp-embed-share-tab-button {
-	display: inline;
+	display: inline-block;
+	*display: inline;
+	*zoom: 1;
 }
 
 .wp-embed-share-tab-button button {
@@ -355,4 +371,4 @@ html[dir="rtl"] .wp-embed-share-tab-button + .wp-embed-share-tab-button {
 	padding: 0 11px 0 0;
 	border-left: none;
 	border-right: 1px solid #aaa;
-}
+}
\ No newline at end of file
diff --git a/src/wp-includes/default-filters.php b/src/wp-includes/default-filters.php
index 75dadfc..42491f3 100644
--- a/src/wp-includes/default-filters.php
+++ b/src/wp-includes/default-filters.php
@@ -446,6 +446,7 @@ add_action( 'parse_query',          'wp_oembed_parse_query'                );
 add_action( 'wp_head',              'wp_oembed_add_discovery_links'        );
 add_action( 'wp_head',              'wp_oembed_add_host_js'                );
 
+add_action( 'oembed_head',          'wp_oembed_enqueue_scripts',     1     );
 add_action( 'oembed_head',          'print_emoji_detection_script'         );
 add_action( 'oembed_head',          'print_emoji_styles'                   );
 add_action( 'oembed_head',          'print_oembed_embed_styles'            );
diff --git a/src/wp-includes/embed-functions.php b/src/wp-includes/embed-functions.php
index 094d8cd..066db33 100644
--- a/src/wp-includes/embed-functions.php
+++ b/src/wp-includes/embed-functions.php
@@ -802,6 +802,27 @@ function wp_oembed_excerpt_attachment( $content ) {
 }
 
 /**
+ * Enqueue embed iframe default CSS and JS & fire do_action('wp_oembed_enqueue_scripts')
+ *
+ * Enqueue PNG fallback CSS for embed iframe for legacy versions of IE.
+ *
+ * Allows plugins to queue scripts for the embed iframe end using wp_enqueue_script().
+ * Runs first in oembed_head().
+ *
+ * @since 4.4.0
+ */
+function wp_oembed_enqueue_scripts() {
+	wp_enqueue_style( 'open-sans' );
+	wp_enqueue_style( 'wp-oembed-embed-ie' );
+	/**
+	 * Fires when scripts and styles are enqueued for the embed iframe.
+	 *
+	 * @since 4.4.0
+	 */
+	do_action( 'wp_oembed_enqueue_scripts' );
+}
+
+/**
  * Prints the CSS in the embed iframe header.
  *
  * @since 4.4.0
diff --git a/src/wp-includes/embed-template.php b/src/wp-includes/embed-template.php
index 9d5371c2..4c64a71 100644
--- a/src/wp-includes/embed-template.php
+++ b/src/wp-includes/embed-template.php
@@ -14,11 +14,9 @@ if ( ! headers_sent() ) {
 	header( 'X-WP-oembed: true' );
 }
 
-wp_enqueue_style( 'open-sans' );
-
 ?>
 <!DOCTYPE html>
-<html <?php language_attributes(); ?>>
+<html <?php language_attributes(); ?> class="no-js">
 <head>
 	<title><?php wp_title( '-', true, 'right' ); ?></title>
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
diff --git a/src/wp-includes/js/wp-oembed-embed.js b/src/wp-includes/js/wp-oembed-embed.js
index 847ebcf..114a9e4 100644
--- a/src/wp-includes/js/wp-oembed-embed.js
+++ b/src/wp-includes/js/wp-oembed-embed.js
@@ -2,6 +2,8 @@
 	'use strict';
 
 	var secret = window.location.hash.replace( /.*secret=([\d\w]{10}).*/, '$1' ),
+		featuredBrowser = ( document.querySelector && window.addEventListener ),
+		loaded = false,
 		resizing;
 
 	function sendEmbedMessage( message, value ) {
@@ -13,6 +15,11 @@
 	}
 
 	function onLoad() {
+		if ( loaded ) {
+			return;
+		}
+		loaded = true;
+
 		var share_dialog = document.querySelector( '.wp-embed-share-dialog' ),
 			share_dialog_open = document.querySelector( '.wp-embed-share-dialog-open' ),
 			share_dialog_close = document.querySelector( '.wp-embed-share-dialog-close' ),
@@ -141,8 +148,6 @@
 		}
 	}
 
-	document.addEventListener( 'DOMContentLoaded', onLoad, false );
-
 	/**
 	 * Iframe resize handler.
 	 */
@@ -158,5 +163,10 @@
 		}, 100 );
 	}
 
-	window.addEventListener( 'resize', onResize, false );
+	if ( featuredBrowser ) {
+		document.documentElement.className = document.documentElement.className.replace( /\bno-js\b/, '' ) + ' js';
+		document.addEventListener( 'DOMContentLoaded', onLoad, false );
+		window.addEventListener( 'load', onLoad, false );
+		window.addEventListener( 'resize', onResize, false );
+	}
 })( window, document );
diff --git a/src/wp-includes/js/wp-oembed.js b/src/wp-includes/js/wp-oembed.js
index dd03bc0..6e92082 100644
--- a/src/wp-includes/js/wp-oembed.js
+++ b/src/wp-includes/js/wp-oembed.js
@@ -1,6 +1,9 @@
 (function ( window, document ) {
 	'use strict';
 
+	var featuredBrowser = ( document.querySelector && window.addEventListener ),
+		loaded = false;
+
 	window.wp = window.wp || {};
 
 	if ( !! window.wp.receiveEmbedMessage ) {
@@ -44,9 +47,12 @@
 		}
 	};
 
-	window.addEventListener( 'message', window.wp.receiveEmbedMessage, false );
-
 	function onLoad() {
+		if ( loaded ) {
+			return;
+		}
+		loaded = true;
+
 		var isIE10 = -1 !== navigator.appVersion.indexOf( 'MSIE 10' ),
 			isIE11 = !!navigator.userAgent.match( /Trident.*rv\:11\./ );
 
@@ -63,5 +69,9 @@
 		}
 	}
 
-	document.addEventListener( 'DOMContentLoaded', onLoad, false );
+	if ( featuredBrowser ) {
+		window.addEventListener( 'message', window.wp.receiveEmbedMessage, false );
+		document.addEventListener( 'DOMContentLoaded', onLoad, false );
+		window.addEventListener( 'load', onLoad, false );
+	}
 })( window, document );
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index cb88adc..b5db5f2 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -728,12 +728,14 @@ function wp_default_styles( &$styles ) {
 	$styles->add( 'open-sans', $open_sans_font_url );
 
 	// Includes CSS
-	$styles->add( 'admin-bar',         "/wp-includes/css/admin-bar$suffix.css", array( 'open-sans', 'dashicons' ) );
-	$styles->add( 'wp-auth-check',     "/wp-includes/css/wp-auth-check$suffix.css", array( 'dashicons' ) );
-	$styles->add( 'editor-buttons',    "/wp-includes/css/editor$suffix.css", array( 'dashicons' ) );
-	$styles->add( 'media-views',       "/wp-includes/css/media-views$suffix.css", array( 'buttons', 'dashicons', 'wp-mediaelement' ) );
-	$styles->add( 'wp-pointer',        "/wp-includes/css/wp-pointer$suffix.css", array( 'dashicons' ) );
-	$styles->add( 'customize-preview', "/wp-includes/css/customize-preview$suffix.css" );
+	$styles->add( 'admin-bar',           "/wp-includes/css/admin-bar$suffix.css", array( 'open-sans', 'dashicons' ) );
+	$styles->add( 'wp-auth-check',       "/wp-includes/css/wp-auth-check$suffix.css", array( 'dashicons' ) );
+	$styles->add( 'editor-buttons',      "/wp-includes/css/editor$suffix.css", array( 'dashicons' ) );
+	$styles->add( 'media-views',         "/wp-includes/css/media-views$suffix.css", array( 'buttons', 'dashicons', 'wp-mediaelement' ) );
+	$styles->add( 'wp-pointer',          "/wp-includes/css/wp-pointer$suffix.css", array( 'dashicons' ) );
+	$styles->add( 'customize-preview',   "/wp-includes/css/customize-preview$suffix.css" );
+	$styles->add( 'wp-oembed-embed-ie',  "/wp-includes/css/wp-oembed-embed-ie$suffix.css" );
+	$styles->add_data( 'wp-oembed-embed-ie', 'conditional', 'lte IE 8' );
 
 	// External libraries and friends
 	$styles->add( 'imgareaselect',       '/wp-includes/js/imgareaselect/imgareaselect.css', array(), '0.9.8' );
