Additionally, you may have to include some polyfills, especially if you are using files from the /examples folder. Note: if you don't need to support these old browsers, then it is not recommended to use the other renderers as they are slower and support less features than the WebGLRenderer. Browsers that support WebGL Google Chrome 9+, Firefox 4+, Opera 15+, Safari 5.1+, Internet Explorer 11 and Microsoft Edge.