Prefer toDataURL over mozGetAsFile if the quality parameter is supplied.

Thanks again to rubenstolk for the contribution:
blueimp#5

Author: blueimp

canvas-to-blob.js

@@ -1,5 +1,5 @@
 /*
- * JavaScript Canvas to Blob 2.0.4
+ * JavaScript Canvas to Blob 2.0.5
  * https://github.com/blueimp/JavaScript-Canvas-to-Blob
  *
  * Copyright 2012, Sebastian Tschan
@@ -72,8 +72,12 @@
             };
     if (window.HTMLCanvasElement && !CanvasPrototype.toBlob) {
         if (CanvasPrototype.mozGetAsFile) {
-            CanvasPrototype.toBlob = function (callback, type) {
-                callback(this.mozGetAsFile('blob', type));
+            CanvasPrototype.toBlob = function (callback, type, quality) {
+                if (quality && CanvasPrototype.toDataURL && dataURLtoBlob) {
+                    callback(dataURLtoBlob(this.toDataURL(type, quality)));
+                } else {
+                    callback(this.mozGetAsFile('blob', type));
+                }
             };
         } else if (CanvasPrototype.toDataURL && dataURLtoBlob) {
             CanvasPrototype.toBlob = function (callback, type, quality) {

canvas-to-blob.min.js

@@ -1,6 +1,6 @@
 {
     "name": "blueimp-canvas-to-blob",
-    "version": "2.0.4",
+    "version": "2.0.5",
     "title": "JavaScript Canvas to Blob",
     "description": "JavaScript Canvas to Blob is a function to convert canvas elements into Blob objects.",
     "keywords": [