webgl2 not available after upgrade from 60.9esr to 68.2esr - debian linux - amd hd 4200
With amd HD 4200 graphics chip:
There was no webgl after updating from 60.9esr to 68.2.0esr on debian, and from debian standard repo.
After setting webgl.force-enabled true, webgl1 works, but no webgl2.
WebGL creation failed:
Refused to create WebGL2 context because of blacklist entry: FEATURE_FAILURE_OLD_FGLRX
GPU: GPU #1 Active Yes Description Gallium 0.4 on AMD RS880 (DRM 2.49.0 / 4.9.0-11-amd64, LLVM 3.9.1) Vendor ID 0x1002 Device ID 0x9710 Driver Vendor mesa/r600 Driver Version 13.0.6.0 RAM 256MB
The ff tarball from mozilla org extracted to /opt shows same behaviour. It should work, but it seems to be looking for fglrx when open source driver/mesa is installed.
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Check these entries in about:config
webgl.disabled = False webgl.enable-webgl2 = True webgl.force-enabled = False
'webgl.force-enabled 'is set to true. When set to false, there is no webgl whatsoever. When set to true, webgl 1 works.
These are set as shown (default) webgl.disabled = False webgl.enable-webgl2 = True
Apparently, FEATURE_FAILURE_OLD_FGLRX is a failsafe/failure of the AMD fglrx driver.