WebGL is now enabled by default in the latest FireFox Beta 8 browser. Principal Firefox Engineer Vlad Vukicevic commented on his blog "3-D games, interactive product displays, scientific and medical visualization, shared virtual environments, and 3-D content creation all become possible on the web." Unlike desktop or mobile OpenGL development, it’s very easy to get started with WebGL. Some simple HTML and JS content lets you immediately start writing WebGL code. Firefox 4 Beta is available here.