Back from the old days of VRML - I remember there used to be a plugin
Uhm, VRML is dead. And it's successor is not WebGL, but X3D. There are plenty of plugins for all operating systems. FreeWRL [1] and InstantPlayer [2] being two of the more active projects
[1] http://freewrl.sourceforge.net/ [2] http://www.instantreality.org/downloads/