Show HN: Make Firefox competely dissappear and reappear[Linux & Mac]

Since this could have undesired side effects while quick browsing here is the url: http://www.christopherwoodall.com/peekaboo

It has something to do with either OS widgets and/or GTK(resizing a window >65555 pixels). Nothing special, i.e. code execution, but interesting to say the least.

I think the fact that the window and task bar item "disappears"(process is still running) then "reappears" after the timeout if neat.