According Net Applications' numbers, WebKit based browser is about to pass Firefox!
WebKit – an Apple-developed, open-sourced rendering platform based on KHTML – is picking up steam on desktop. On laptop and desktop computers, WebKit-powered browsers are closing in on Mozilla’s Firefox, which is the world’s second most-popular browser.
ConceivablyTech pointed out that Google’s aggressive marketing push has helped Chrome score major gains recently. And the gain on Chrome and Safari appears to be at the expense of Microsoft's IE.
UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:188.8.131.52) Gecko/20110420 AlexaToolbar/alxf-2.11 Firefox/3.6.17