navigator.__defineGetter__('plugins', function(){ return new Object(); }); Of course, you'd actually have to do a bit more work to make it bulletproof (oth

navigator.__defineGetter__('plugins', function(){ return new Object(); }); Of course, you'd actually have to do a bit more work to make it bulletproof (otherwise fingerprinters could use the fact that you modified your default navigator object as a way to uniquely identify you !) I imagine ultimately it's almost impossible to defeat fingerprinters in JS, as they could do tricky stuff like timing attacks to get you. Use NoScript if you're concerned.