xsrc/54247: Firefox can't use WebGL

[coypu%sdf.org@localhost]

>Number:         54247
>Category:       xsrc
>Synopsis:       Firefox can't use WebGL
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    xsrc-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 29 01:35:00 +0000 2019
>Originator:     coypu
>Release:        NetBSD 8.99.41
>Organization:
>Environment:
NetBSD plu 8.99.41 NetBSD 8.99.41 (GENERIC) #0: Thu May 23 18:48:19 IDT 2019  fly@plu:/home/fly/obj/sys/arch/amd64/compile/GENERIC amd64

>Description:
Examine about:support

WebGL creation failed: * tryNativeGL * Exhausted GL driver options.

This works with modular xorg. This must be a local bug. Missing libraries? unclear.
>How-To-Repeat:

>Fix: