Firefox 3.5 was built for speed and performance, compared to previous versions of Firefox. Firefox 3.5 performed better than Firefox 3.0.5 and Internet Explorer 8 in all three categories.
From the graphs, it is clear to see that Google Chrome performed the best overall, followed shortly by Safari 4 and then Firefox 3.5. Firefox 3.5 scored a 93 on the ACID 3 test, falling shortly behind Google Chrome, Safari and Opera 10 alpha, all scoring a perfect 100.
Firefox 3.5 is fast and speedy, but it's still lacking the speed of Google Chrome or Safari 4 in terms of performance benchmarks.