Gets the user's GPU name using the `WEBGL_debug_renderer_info` WebGL extension. It returns a `string` with the graphics card name or `unknow` if the extension is not supported.

detect_gpu.js

function getGraphicsCardName() {
	var canvas = document.createElement("canvas");
	var gl = canvas.getContext("experimental-webgl") || canvas.getContext("webgl");
	
	if (!gl) {
		return "Unknow";
	}
	
	var ext = gl.getExtension("WEBGL_debug_renderer_info");
	if (!ext) {
		return "Unknow";
	}
	
	return gl.getParameter(ext.UNMASKED_RENDERER_WEBGL);
}

getGraphicsCardName();
// ANGLE (Intel(R) HD Graphics 4600 Direct3D11 vs_5_0 ps_5_0) On Google Chrome 50 dev
// Intel(R) HD Graphics 4600 On Microsoft Edge 13 or Internet Explorer 11.63.10586.0 / 11.0.26
// Unknow on Firefox 44 by default
// ANGLE (Intel(R) HD Graphics 4600 Direct3D11 vs_5_0 ps_5_0) on Firefox 44 by enabling the `webgl.enable-debug-renderer-info` flag in `about:config`

If I have webgl debugger renderer data, how can I filter out malicious ones?