“ P ASTE CODE below IN ADDRESS BAR AND SEE THE SHAKE javascript:function Shw(n) {if (self.moveBy) {for (i = 35; i > 0; i--) {for (j = n; j > 0; j--) {self.moveBy(1,i);self.moveBy(i,0);self.moveBy(0,-i);self.moveBy(-i,0); } } }} Shw(9)=======================================================Note: only shakes for nine seconds. to change shaking time modify the last number in bracket to any number you want (shown in red in the code) Read more On "Shake The firefox!!!"! ”