This demo is by Olli Pettay (smaug) with help from Austin King. A common limitation on the web today has been a rich file upload widget for web applications. Many sites use Flash or a desktop helper applications to improve the experience of uploading files. Firefox 3.5 bridges one of these gaps allowing a better progress indicator to be built. Many developers don’t realize that they can use Firefo
![XHR progress and rich file upload feedback – Mozilla Hacks - the Web developer blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/8f043099b608abf8384b24171faa177d3698e62e/height=288;version=1;width=512/https%3A%2F%2Fhacks.mozilla.org%2Fwp-content%2Fthemes%2FHax%2Fimg%2Fhacks-meta-image.jpg)