Updates to this story
Microsoft has been telling the world and its dog that IE 9 is the only one to use hardware to accelerate all browser operations and this makes it much faster.
Writing from his bog, Mozilla's Robert O'Callahan said that he is upset about this aspect of Microsoft's IE9 marketing.
He said that Redmond's disdainful statement that other browsers are choosing to accelerate only pieces of the web is completely hypocritical, because that's exactly what it is doing.
O'Callahan points out that few applications on the internet take advantage of hardware acceleration anyway.
While he admitted that there are speed differences in the various benchmarks between Firefox and IE9 most of them were caused by "relatively small bugs in Firefox, bugs in IE9, and bugs in the benchmarks" and are not due to any major architectural issues in Firefox.