Cardboard Webgl not working

I'm trying to make a cardboard simulator and I can't figure out why the game doesn't work. Not sure if I have to change something in the build settings. Anyway here are the errors I get in the Firefox console,

uncaught exception: abort(129) at jsStackTrace@blob:null/501d4287-deec-644e-b369-7c693ef45c00:1:22814
stackTrace@blob:null/501d4287-deec-644e-b369-7c693ef45c00:1:22997
abort@blob:null/501d4287-deec-644e-b369-7c693ef45c00:32:52290...

Cardboard Webgl not working