WebGL is the 3D graphics language for web browsers. It's part of the OpenGL family.
Tootsville V only works in browsers with WebGL enabled.
- http://www.doesmybrowsersupportwebgl.com/ will tell you whether you have this, as “Yay” or “Nay.”
Another on-line game happens to have a convenient test program
Let that run for about 5-10 minutes and observe the number at the bottom-left.
We'll have our own benchmark in Minimum Requirements sooner than later.