Changed modifiedAPI to support FF28.

Fixes #69.

install.rdf

@@ -3,7 +3,7 @@
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. --><RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="http://www.mozilla.org/2004/em-rdf#">
   <Description about="urn:mozilla:install-manifest">
     <em:id>CanvasBlocker@kkapsner.de</em:id>
-    <em:version>0.2.2.1-OtherRelease</em:version>
+    <em:version>0.2.2.2-OtherRelease</em:version>
     <em:type>2</em:type>
     <em:bootstrap>true</em:bootstrap>
     <em:unpack>false</em:unpack>
@@ -12,7 +12,7 @@
     <em:targetApplication>
       <Description>
         <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
-        <em:minVersion>36.0</em:minVersion>
+        <em:minVersion>28.0</em:minVersion>
         <em:maxVersion>40.0</em:maxVersion>
       </Description>
     </em:targetApplication>

lib/modifiedAPI.js

@@ -18,7 +18,7 @@
 				window.HTMLCanvasElement.prototype.getContext.call(original, "experimental-webgl") ||
 				window.HTMLCanvasElement.prototype.getContext.call(original, "webgl2") ||
 				window.HTMLCanvasElement.prototype.getContext.call(original, "experimental-webgl2");
-			imageData = new window.wrappedJSObject.ImageData(original.width, original.height);
+			imageData = context.createImageData(original.width, original.height);
 			source = new window.wrappedJSObject.Uint8Array(imageData.data.length);
 			window.WebGLRenderingContext.prototype.readPixels.call(
 				context,
@@ -98,7 +98,7 @@
 				var context = window.HTMLCanvasElement.prototype.getContext.call(getFakeCanvas(window, this.canvas), "2d");
 				var data = window.CanvasRenderingContext2D.prototype.getImageData.apply(context, arguments).data;
 				
-				var imageData = new window.wrappedJSObject.ImageData(sw, sh);
+				var imageData = context.createImageData(sw, sh);
 				for (var i = 0, l = data.length; i < l; i += 1){
 					imageData.data[i] = data[i];
 				}

package.json

@@ -107,6 +107,6 @@
 	"main": "lib/main.js",
 	"author": "Korbinian Kapsner",
 	"license": "MPL 2.0",
-	"version": "0.2.2-Release",
+	"version": "0.2.2.2-OtherRelease",
 	"permissions": {"private-browsing": true}
 }