Is the roulade at least made of meat? Because I can just imagine you feeding it to him as a sweet roulade.
I don't know if cats eat them, but the owner (who didn't have a cat before, just got one six months ago) said to put it in his bowl)
I haven't had any problems with Firefox in four years. Maybe you should try reinstalling your OS.
And Chrome is just terrible and inconvenient in some ways. And you can't group tabs in it.