Try Google Chrome for Mac

Google Chrome for Mac is still very much in Beta, but the latest Dev Channel build is actually pretty decent (for web browsing, features are still lacking). The biggest advantage to Google Chrome is that each Browser Window or Tab is ‘sandboxed’, meaning if a website goes haywire and crashes, only that websites window or tab crashes and not the entire browser! Safari has a similar feature for plugins but not for tabs, I’d bet that in time they will though. Anyway check out the latest Dev Channel version of Google Chrome:

Developer home
Download now