If you are using three.js webGLRenderer, there is a
.info property that should give the info you are looking for:
I use to integrate
threex.rendererstats from learningthreejs.com, which encapsulate the .info details into a little app. Unfortunatly, the app stopped working a few version back. Maybe someone could refresh the code as it gives very usefull details, specially when one starts looking a memory/perf management...
Another option would be to use the shader editor from firefox dev edition that gives the loaded/unloaded programs.
GL & HF