Under windows, there are two main 3D libraries. I am wondering WebGL use which? is it configurable? Is it configurable per browser?
I am wondering WebGL use which?
Depends on the browser and the OS.
is it configurable?
Depends on the browser.
Is it configurable per browser?
You mean JavaScript? No.
But why do you care?
Chrome and Firefox use ANGLE so that they work out of the box on a Windows system with only the default drivers supplied by Microsoft installed. For a proper OpenGL implementation installed the user needs to have downloaded and installed the original drivers from the HW vendor. If not, all you get is a rather crappy OpenGL-1.4 implementation/emulation built upon Direct3D 9.