here is a paragraph from the microsoft 2004 annual report

[D. Joe Anderson]

On Tue, Oct 26, 2004 at 04:47:40PM -0500, Jonathan Hutchins wrote:
> On Tuesday 26 October 2004 04:01 pm, Zscoundrel wrote:
> 
> Well, they did do a ground-up rewrite of the mosaic code for their second 
> release of Internet Explorer - something that would be a vast improvement if 
> Mosaic were to do the same, especially with modern considerations and 
> security.
> 
> There are still bugs in Mozilla that I recognise from very early releases of 
> Mosaic.

Isn't that what Firefox is about?

-- 
Joe