Do you want to have some fun and want to impress your friends?? If yes, then this trick is for you. By using this you can move your Firefox window automatically.
Here are steps:
1). Open Firefox browser.
2). Just copy the following javascript and paste it to address bar and hit enter.
javascript:a=0;x=0;y=0;setInterval("a+=.01;x=Math.cos(a*3)*2; y=Math.sin(a*2)*2;moveBy(x,y)",2);void(0)
3). To stop moving, just refresh the window or press f5.
enjoy...