Mozilla has been busy working on Electrolysis – a project which aims to introduce multi-core optimizations in Firefox. Firefox 3.7 will include the first stages of Electrolysis. However, it won’t get full-fledged multi-process support until v4.0.
My Outsourced Brain put a pre-release build of Firefox 3.7 through the paces. The results were quite impressive. The pre-release build was about 3 times faster than 3.5.6pre and only 50% slower than Chrome. Opera 10.5 pre-alpha wasn’t included in the tests. However, in all likelihood Opera too would have trumped Firefox, as Opera 10.5 is as fast as Chrome (if not faster).
(lower is better)