diff --git a/src/wp-admin/css/common.css b/src/wp-admin/css/common.css
index 3c9feeebd9..c5c4e70566 100644
--- a/src/wp-admin/css/common.css
+++ b/src/wp-admin/css/common.css
@@ -1838,6 +1838,7 @@ div.action-links {
 	line-height: 18px;
 	font-size: 14px;
 	text-decoration: none;
+	-webkit-transition: none;
 	transition: none;
 }
 
diff --git a/src/wp-admin/css/customize-controls.css b/src/wp-admin/css/customize-controls.css
index 8e0d25499d..83231c9a5b 100644
--- a/src/wp-admin/css/customize-controls.css
+++ b/src/wp-admin/css/customize-controls.css
@@ -469,6 +469,7 @@ body {
 
 #customize-control-header_image .current .container {
 	overflow: hidden;
+	-webkit-border-radius: 2px;
 	border-radius: 2px;
 }
 
@@ -526,6 +527,7 @@ body {
 
 #customize-control-header_image .random.placeholder {
 	cursor: pointer;
+	-webkit-border-radius: 2px;
 	border-radius: 2px;
 	height: 40px;
 }
@@ -536,7 +538,6 @@ body {
 
 #customize-control-header_image .placeholder:hover .dice {
 	-webkit-animation: dice-color-change 3s infinite;
-	-moz-animation: dice-color-change 3s infinite;
 	-ms-animation: dice-color-change 3s infinite;
 	animation: dice-color-change 3s infinite;
 }
@@ -548,13 +549,6 @@ body {
 	100% { color: #d4b146; }
 }
 
-@-moz-keyframes dice-color-change {
-	0% { color: #d4b146; }
-	50% { color: #ef54b0; }
-	75% { color: #7190d3; }
-	100% { color: #d4b146; }
-}
-
 @-ms-keyframes dice-color-change {
 	0% { color: #d4b146; }
 	50% { color: #ef54b0; }
@@ -598,6 +592,7 @@ body {
 
 #customize-control-header_image img {
 	width: 100%;
+	-webkit-border-radius: 2px;
 	border-radius: 2px;
 }
 
diff --git a/src/wp-admin/css/customize-widgets.css b/src/wp-admin/css/customize-widgets.css
index 768e7698d8..c37bc6b221 100644
--- a/src/wp-admin/css/customize-widgets.css
+++ b/src/wp-admin/css/customize-widgets.css
@@ -314,7 +314,6 @@
 	-moz-user-select: none;
 	-ms-user-select: none;
 	user-select: none;
-	-moz-outline: none;
 	outline: none;
 }
 
diff --git a/src/wp-admin/css/themes.css b/src/wp-admin/css/themes.css
index 7f40b21199..cf240a1615 100644
--- a/src/wp-admin/css/themes.css
+++ b/src/wp-admin/css/themes.css
@@ -1067,7 +1067,9 @@ body.folded .theme-overlay .theme-wrap {
 
 .theme-navigation {
 	background: #fff;
+	-webkit-box-shadow: 0 1px 1px 0 rgba(0,0,0,.1);
 	box-shadow: 0 1px 1px 0 rgba(0,0,0,.1);
+	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
 	box-sizing: border-box;
 	color: #555;
@@ -1090,6 +1092,7 @@ body.folded .theme-overlay .theme-wrap {
 	display: inline;
 }
 .upload-theme {
+	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
 	box-sizing: border-box;
 	display: none;
@@ -1138,8 +1141,8 @@ body.show-upload-theme .upload-theme + .theme-navigation + .theme-browser {
 	display: inline-block;
 	margin: 0 10px;
 	padding: 15px 0;
-	-moz-transition: border-color .1s ease-in;
 	-webkit-transition: border-color .1s ease-in;
+	transition: border-color .1s ease-in;
 }
 .theme-section.current,
 .theme-filter.current {
@@ -1155,13 +1158,13 @@ body.show-upload-theme .upload-theme + .theme-navigation + .theme-browser {
 	display: inline-block;
 	margin: 0 10px;
 	padding: 4px 6px;
-	-moz-transition: color .1s ease-in, background .1s ease-in;
 	-webkit-transition: color .1s ease-in, background .1s ease-in;
 	transition: color .1s ease-in, background .1s ease-in;
 }
 body.more-filters-opened .more-filters,
 body.more-filters-opened .more-filters:before {
 	background: rgb(46, 162, 204);
+	-webkit-border-radius: 2px;
 	border-radius: 2px;
 	border: none;
 	color: #fff;
@@ -1191,7 +1194,6 @@ body.more-filters-opened .more-filters:before {
 	font-weight: normal;
 	font-style: normal;
 	vertical-align: top;
-	-moz-transition: color .1s ease-in 0;
 	-webkit-transition: color .1s ease-in 0;
 	transition: color .1s ease-in 0;
 	text-align: center;
@@ -1210,6 +1212,7 @@ body.more-filters-opened .more-filters-container {
 	display: block;
 }
 .more-filters-container .filters-group {
+	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
 	box-sizing: border-box;
 	float: left;
diff --git a/src/wp-includes/css/editor.css b/src/wp-includes/css/editor.css
index 6413f751c7..219b5839c8 100644
--- a/src/wp-includes/css/editor.css
+++ b/src/wp-includes/css/editor.css
@@ -197,8 +197,6 @@ div.mce-statusbar {
 	background: #eee;
 	background-image: -webkit-gradient(linear, left bottom, left top, from(#f6f6f6), to(#e3e3e3));
 	background-image: -webkit-linear-gradient(bottom, #f6f6f6, #e3e3e3);
-	background-image:    -moz-linear-gradient(bottom, #f6f6f6, #e3e3e3);
-	background-image:      -o-linear-gradient(bottom, #f6f6f6, #e3e3e3);
 	background-image: linear-gradient(to top, #f6f6f6, #e3e3e3);
 }
 
@@ -933,6 +931,7 @@ i.mce-i-wp_page:before {
 	top: 50%;
 	left: 50%;
 	z-index: 100105;
+	-webkit-transition: height 0.2s, margin-top 0.2s;
 	transition: height 0.2s, margin-top 0.2s;
 }
 
@@ -1153,6 +1152,7 @@ i.mce-i-wp_page:before {
 #wp-link .item-title {
 	display: inline-block;
 	width: 80%;
+	width: -webkit-calc(100% - 68px);
 	width: calc(100% - 68px);
 }
 
@@ -1243,6 +1243,7 @@ i.mce-i-wp_page:before {
 
 @media screen and ( max-height: 520px ) {
 	#wp-link-wrap {
+		-webkit-transition: none;
 		transition: none;
 	}
 
@@ -1272,6 +1273,7 @@ i.mce-i-wp_page:before {
 
 	#link-selector {
 		overflow: auto;
+		height: -webkit-calc(100% - 92px);
 		height: calc(100% - 92px);
 		padding-bottom: 2px;
 	}