diff --git a/examples/spreads.html b/examples/spreads.html
index b7bfc7e..039e911 100644
--- a/examples/spreads.html
+++ b/examples/spreads.html
@@ -18,7 +18,7 @@
   <a id="next" href="#next" class="arrow">›</a>
 
   <script>
-    var params = new URLSearchParams(document.location.search.substring(1));
+    var params = URLSearchParams && new URLSearchParams(document.location.search.substring(1));
     var url = params && params.get("url") && decodeURIComponent(params.get("url"));
     var currentSectionIndex = (params && params.get("loc")) ? params.get("loc") : 0;
 
diff --git a/package.json b/package.json
index 48e644a..d8a6f3c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "epubjs",
-  "version": "0.3.32",
+  "version": "0.3.33",
   "description": "Parse and Render Epubs",
   "main": "lib/index.js",
   "module": "src/index.js",
diff --git a/src/epub.js b/src/epub.js
index 4d23a24..d4438c6 100644
--- a/src/epub.js
+++ b/src/epub.js
@@ -2,6 +2,7 @@ import Book from "./book";
 import EpubCFI from "./epubcfi";
 import Rendition from "./rendition";
 import Contents from "./contents";
+import * as core from "./utils/core";
 
 /**
  * Creates a new Book
@@ -23,6 +24,7 @@ if (typeof(global) !== "undefined") {
 ePub.CFI = EpubCFI;
 ePub.Rendition = Rendition;
 ePub.Contents = Contents;
+ePub.utils = core;
 
 ePub.ViewManagers = {};
 ePub.Views = {};
diff --git a/src/managers/continuous/index.js b/src/managers/continuous/index.js
index 8e98309..19507a1 100644
--- a/src/managers/continuous/index.js
+++ b/src/managers/continuous/index.js
@@ -276,7 +276,7 @@ class ContinuousViewManager extends DefaultViewManager {
 		var offset = horizontal ? this.scrollLeft : this.scrollTop;
 		var visibleLength = horizontal ? bounds.width : bounds.height;
 		var contentLength = horizontal ? this.container.scrollWidth : this.container.scrollHeight;
-		console.log(bounds);
+
 		if (offset + visibleLength + delta >= contentLength) {
 			last = this.views.last();
 			next = last && last.section.next();
diff --git a/src/utils/core.js b/src/utils/core.js
index 848c59b..ab2ec62 100644
--- a/src/utils/core.js
+++ b/src/utils/core.js
@@ -38,8 +38,8 @@ export function isFloat(n) {
 }
 
 export function prefixed(unprefixed) {
-	//var vendors = ["Webkit", "Moz", "O", "ms" ];
-	var vendors = ["-Webkit-", "-moz-", "-o-", "-ms-"];
+	var vendors = ["Webkit", "webkit", "Moz", "O", "ms" ];
+	var prefixes = ["-webkit-", "-webkit-", "-moz-", "-o-", "-ms-"];
 	var upper = unprefixed[0].toUpperCase() + unprefixed.slice(1);
 	var length = vendors.length;
 
@@ -49,7 +49,7 @@ export function prefixed(unprefixed) {
 
 	for ( var i=0; i < length; i++ ) {
 		if (typeof(document.body.style[vendors[i] + upper]) != "undefined") {
-			return vendors[i] + upper;
+			return prefixes[i] + unprefixed;
 		}
 	}