person You just read some constructor code. ES6 is ES5 javascript but with some updates (read more here (https://www.w3schools.com/js/js_es6.asp))
Also there's ES7, 8, 9 and 10, but with only a small update
You don't 'FIND' the newer versions, your browser should already support them. The way newer versions might not be compatible for all browsers thoug (es7, 8, 9, 10, you'd have to do your own reasearch).
If you're using cdo, they're never gonna update it, so if you want to
you can just download your own code editor (i recommend sublime text cause u can auto save)