Closing, looks like a browser addon bug rather than a Construct 2 bug. Try disabling all your addons and it should work.
I don't get that error, and as far as I am aware, there is no file called 'cuddlefish.js' in C2, which implies that it may be a browser plugin that is at fault.
Yes, i got it. It was a browser-addon bug. Thanks for your reply.