Firefox and Safari JS compilers are actually fast too. Even faster than V8 in some cases. For example, I was surprised to find out recently that Firefox 25 is

Firefox and Safari JS compilers are actually fast too. Even faster than V8 in some cases. For example, I was surprised to find out recently that Firefox 25 is smoother and faster nowadays than Chrome on Mac Os X when running my interactive geometry genereator that is based on javascript/canvas (http://GeoKone.NET http://GeoKone.NET).