Work around https://bugzilla.mozilla.org/show_bug.cgi?id=1085060

formdata.js

@@ -28,7 +28,7 @@
     exports.FormData = FormData;
 
     var ___send$rw = XMLHttpRequest.prototype.send;
-    XMLHttpRequest.prototype.send = function(data) {
+    XMLHttpRequest.prototype.send2 = function(data) {
         if (data instanceof FormData) {
             if (!data.__endedMultipart) data.__append('--' + data.boundary + '--\r\n');
             data.__endedMultipart = true;
@@ -36,7 +36,13 @@
             data = new Uint8Array(data.data);
         }
         // Invoke original XHR.send
-        return ___send$rw.call(this, data);
+
+		//https://bugzilla.mozilla.org/show_bug.cgi?id=1085060
+		var copy = new ArrayBuffer(data.byteLength);
+		new Uint8Array(copy).set(new Uint8Array(data));
+
+		console.log("sending");
+		return this.send(copy);
     };
 
     function FormData() {

worker.js

@@ -26,5 +26,5 @@ function uploadBuffer(pomfclone, buffer, filename) {
 	request.onload = function(e) {
 		postMessage(request.response);
 	};
-	request.send(formData);
+	request.send2(formData);
 };