diff --git a/lib/frame.js b/lib/frame.js
index cc134a7..a9b31a9 100644
--- a/lib/frame.js
+++ b/lib/frame.js
@@ -8,6 +8,7 @@
 	const {ask} = require("./askForPermission.js");
 	const lists = require("./lists.js");
 	const {check: originalCheck, checkStack: originalCheckStack} = require("./check.js");
+	const getWrapped = require("sdk/getWrapped");
 	
 	const logging = require("./logging");
 	const {error, warning, message, notice, verbose, setPrefix: setLogPrefix} = logging;
@@ -100,11 +101,11 @@
 			{check, checkStack, ask: askWrapper, notify, prefs}
 		);
 		message("prepare to intercept (i)frames.");
-		
+
 		[window.HTMLIFrameElement, window.HTMLFrameElement].forEach(function(constructor){
 			var oldContentWindowGetter = constructor.prototype.__lookupGetter__("contentWindow");
 			Object.defineProperty(
-				constructor.prototype.wrappedJSObject,
+				getWrapped(constructor.prototype),
 				"contentWindow",
 				{
 					enumerable: true,
@@ -118,7 +119,7 @@
 			);
 			var oldContentDocumentGetter = constructor.prototype.__lookupGetter__("contentDocument");
 			Object.defineProperty(
-				constructor.prototype.wrappedJSObject,
+				getWrapped(constructor.prototype),
 				"contentDocument",
 				{
 					enumerable: true,
diff --git a/lib/intercept.js b/lib/intercept.js
index 632a756..535796c 100644
--- a/lib/intercept.js
+++ b/lib/intercept.js
@@ -15,6 +15,8 @@
 	
 	const {changedFunctions, setRandomSupply} = require("./modifiedAPI");
 	const randomSupplies = require("./randomSupplies");
+	const getWrapped = require("sdk/getWrapped");
+
 	setRandomSupply(randomSupplies.nonPersistent);
 	var apiNames = Object.keys(changedFunctions);
 	var undef;
@@ -64,7 +66,7 @@
 							changedFunction.object:
 							[changedFunction.object]
 					).forEach(function(object){
-						var constructor = window.wrappedJSObject[object];
+						var constructor = getWrapped(window)[object];
 						if (constructor){
 							var original = constructor.prototype[name];
 						
@@ -134,7 +136,7 @@
 														case false:
 															return undef;
 														default:
-															return exportFunction(fake, window.wrappedJSObject);
+															return exportFunction(fake, getWrapped(window));
 													}
 												//case "block":
 												default:
diff --git a/lib/modifiedAPI.js b/lib/modifiedAPI.js
index 3d89667..931bf7a 100644
--- a/lib/modifiedAPI.js
+++ b/lib/modifiedAPI.js
@@ -16,6 +16,7 @@
 	const colorStatistics = require("./colorStatistics");
 	const logging = require("./logging");
 	const {copyCanvasToWebgl} = require("./webgl");
+	const getWrapped = require("sdk/getWrapped");
 	
 	var randomSupply = null;
 	
@@ -30,8 +31,8 @@
 		var imageData;
 		var source;
 		if ((context.canvas.width || 0) * (context.canvas.height || 0) === 0){
-			imageData  = new window.wrappedJSObject.ImageData(0, 0);
-			source  = new window.wrappedJSObject.ImageData(0, 0);
+			imageData  = new getWrapped(window).ImageData(0, 0);
+			source  = new getWrapped(window).ImageData(0, 0);
 		}
 		else if (context instanceof window.CanvasRenderingContext2D){
 			imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(
@@ -42,7 +43,7 @@
 			source = imageData.data;
 		}
 		else {
-			imageData  = new window.wrappedJSObject.ImageData(context.canvas.width, context.canvas.height);
+			imageData  = new getWrapped(window).ImageData(context.canvas.width, context.canvas.height);
 			source = new Uint8Array(imageData.data.length);
 			window.WebGLRenderingContext.prototype.readPixels.call(
 				context,
diff --git a/lib/require.js b/lib/require.js
index 3465c5a..ec05826 100644
--- a/lib/require.js
+++ b/lib/require.js
@@ -9,6 +9,11 @@ function require(module){
 		var scopeName = module.substr(2).replace(/\..+/, "");
 		return window.scope[scopeName];
 	}
+	else if (module === "sdk/getWrapped"){
+		return function getWrapped(obj){
+			return obj.wrappedJSObject || obj;
+		};
+	}
 	else if (module === "sdk/simple-prefs"){
 		return {
 			prefs: settings,