Another announcement from the Apple love fest that is WWDC is the release of the final version of Safari 4. This latest browser is extremel fast and can hand javascript (both valid and malicious) like mad.

Safari 4 adds a plug-in isolation feature; this is similar t Google's Chrome in that when you launch a plug-in it opens that plug-in in its own space. This means that if the plug-in crashes you do not lose the whole browser just that tab. (IE 8 has this also)

If you are interested Safari 4 should be ready for live download later today. Just remember that Safari while blazingly fast is also one of the easiest browsers to hack.

Read more here.

Apple's touting Safari 4's Javascript performance, something that shouldn't surprise those of you running WebKit. Apple says it's eight times faster than IE8's Javascript engine, and also passes the Acid3 test at 100/100. IE8's score? 21/100.

The biggest news, though, is that, like Google Chrome, Safari 4 now hands each plugin off to its own process. So if you're watching a YouTube video and the Flash plugin crashes, only that tab will crash and not the whole browser. God that makes me happy.