diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_blob-channelname.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_blob-channelname.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+Cu.import("resource://gre/modules/NetUtil.jsm");
+
+function test() {
+    var file = new File(new Blob(['test'], {type: 'text/plain'}), {name: 'test-name'});
+    var url = URL.createObjectURL(file);
+    var channel = NetUtil.newChannel(url);
+
+    is(channel.contentDispositionFilename, 'test-name', "filename matches");
+}