I'm a web developer that makes webapps that work in all modern browsers. Amazingly enough, I use 100% valid HTML5, CSS3, and JavaScript. Occasionally, I have to release interesting fixes, to say the least, because my webapps don't work in the latest versions for some reason.
Thus, I have the latest versions of all browsers as well as the betas. Firefox Aurora, Chrome Canary, IE10, and Opera Next 12.
I have but one missing: Safari. Of course I have the normal version of Safari, but can I get ahead of the curve before the launch of the next Safari update by Apple?
I'm looking for either the Mac or the Windows versions - both if possible.