this post say that firexfox 3 beta 4 is faster than safari and safari is faster than IE 8 / IE 7.
there are some benchmark test results inside the link.
http://blogs.zdnet.com/hardware/?p=1536
for year 2008, two more new web browsers will emerge.
IE 8 and firefox 4....what does it mean for developers? compliance to standards and app upgrades for the app team.
http://blogs.computerworld.com/node/4342