The WEBGL_debug_renderer_info extension is part of the WebGL API and exposes two constants with information about the graphics driver for debugging purposes.

Depending on the privacy settings of the browser, this extension might only be available to privileged contexts. Generally, the graphics driver information should only be used in edge cases to optimize your WebGL content or to debug GPU problems. The WebGLRenderingContext.getParameter() method can help you to detect which features are supported and the failIfMajorPerformanceCaveat context attribute lets you control if a context should be returned at all, if the performance would be dramatically slow.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Availability: Depending on the privacy settings of the browser, this extension might only be available to privileged contexts or not work at all. In Firefox, if privacy.resistFingerprinting is set to true, this extensions is disabled.

This extension is available to both, WebGL1 and WebGL2 contexts.


Vendor string of the graphics driver.
Renderer string of the graphics driver.


With the help of this extension, privileged contexts are able to retrieve debugging information about about the user's graphic driver:

var canvas = document.getElementById('canvas');
var gl = canvas.getContext('webgl');

var debugInfo = gl.getExtension('WEBGL_debug_renderer_info');
var vendor = gl.getParameter(debugInfo.UNMASKED_VENDOR_WEBGL);
var renderer = gl.getParameter(debugInfo.UNMASKED_RENDERER_WEBGL);



Specification Status Comment
The definition of 'WEBGL_debug_renderer_info' in that specification.
Recommendation Initial definition.

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
WEBGL_debug_renderer_infoChrome Full support 33Edge Full support ≤18Firefox Full support 53
Full support 53
No support ? — 53
Disabled Until version 53 (exclusive): this feature is behind the webgl.enable-debug-renderer-info preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support YesSafari Full support YesWebView Android Full support 37Chrome Android Full support 33Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android Full support 2.0


Full support
Full support
No support
No support
Compatibility unknown
Compatibility unknown
User must explicitly enable this feature.
User must explicitly enable this feature.

See also