For rendering the HTML, he used Qt's QWebView widget. In his proof-of-concept browser, each tab is a separate QWebView instance in an external process that is integrated in the host window via XEmbed.

So I'm using the latest PyQt (which uses Qt 4.6) to create a program that blah blah and has a dock with a file browser. I have the file browser working fine, displaying My Computer as the root ...