more at: https://github.com/molokoloco/jQuery.boxFx/blob/master/js/jquery.boxFx.tools.js#L124

getPrefix

var getPrefix = (function(browser) { // Closure for putting result in cache
  var prefixes = {firefox:'moz', applewebkit:'webkit', webkit:'webkit', opera:'o', msie:'ms'};
  for (var p in prefixes)
    if (browser.indexOf(p) !== -1) return prefixes[p];
    return false;
})(navigator.userAgent.toLowerCase());

// console.log(getPrefix);