About about:blankabout:blank is probably the hardest Web page to load. In fact, it is so hard that in order to turn the HTML5 parser on by default in Firefox last year, we decided to special-case about:blank to use the old parser in Firefox 4. In Firefox, about:blank is sometimes parsed from a stream and sometimes its DOM is generated without running a parser. The problem that prevented us from using the HTML5 par
