To quote their site
"Arora is a simple cross platform web browser. Currently Arora is a very basic browser whose feature list includes things like "History" and "Bookmarks". When using Qt 4.4 Arora does not have support for netscape plugins, but if you use qt-snapshot then it will work. But it is small, less than 10,000 lines of code, very fast, lean, mean and loads of fun to hack on. Arora and QtWebKit is developed to be cross-platform using the Qt library. It was originally created as a demo for Qt to help test the QtWebKit component and find API issues and bugs before the release. An older version can still be found in Qt's source code in the demo/browser directory. Arora works on Linux, OS X, Windows, FreeBSD, and embedded Linux using Qt Embedded."
Screenshot of captcha of Brainstorm in Arora:
As you can see it renders it perfectly.
But the down side of Arora is that it's a very basic browser nowhere near to Firefox or konqueror.