diff --git a/css/reveal.scss b/css/reveal.scss
index 345b8c4f..46aa11ec 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -999,7 +999,7 @@ $controlsArrowAngleActive: 36deg;
 		border-radius: 4px;
 		box-shadow: 0px 95px 25px rgba(0,0,0,0.2);
 
-		-webkit-transform: translateZ(-90px) rotateX( 65deg );
+		transform: translateZ(-90px) rotateX( 65deg );
 	}
 
 .reveal.page .slides>section.stack {
@@ -1318,12 +1318,6 @@ $controlsArrowAngleActive: 36deg;
 	perspective-origin: 50% 50%;
 	perspective: 700px;
 
-	.slides {
-		// Fixes overview rendering errors in FF48+, not applied to
-		// other browsers since it degrades performance
-		-moz-transform-style: preserve-3d;
-	}
-
 	.slides section {
 		height: 100%;
 		top: 0 !important;
@@ -1356,10 +1350,6 @@ $controlsArrowAngleActive: 36deg;
 
 	.backgrounds {
 		perspective: inherit;
-
-		// Fixes overview rendering errors in FF48+, not applied to
-		// other browsers since it degrades performance
-		-moz-transform-style: preserve-3d;
 	}
 
 	.backgrounds .slide-background {