User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:22.0) Gecko/20130506 Firefox/22.0 Build ID: 20130506004015 Steps to reproduce: Go to any site that checks WEBGL extension support, such as http://www.browserleaks.com/webgl Or write basic WEBGL code to check for WEBGL_depth_texture extension support. Actual results: WEBGL_depth_texture is not supported by Firefox when using a MacBook Pro Retina. Expected results: WEBGL_depth_texture should be supported. A few versions of Firefox ago it was working and now it is not (sorry, I don't know exactly when it broke, but I think it was around v16 or v17). The extension still works in Chrome.
Still a problem in Firefox 24.
Could you use mozregression to find the regression range?
Last good nightly: 2012-12-19 First bad nightly: 2012-12-20
Turns out this was an intentional blacklisting of MacOS+NVIDIA.