Comment 8 for bug 29584

In Firefox:
1. open a Firefox window
2. open a new tab (CTRL T)
3. try to close the window by hitting the "x" button up in the title bar
4. a dialog pops up with the text "You are about to close 2 open tabs. Are you sure you want to continue?"
5. wait 5 seconds (maybe a little more or less, I didn't measure it)
6. another dialog pops up that says the window is not responding, with options to cancel or force quit.

In OpenOffice.org or gedit:
1. open a new window
2. type some stuff
3. try to close the window by hitting the "x" button
4. get the "are you sure you want to quit" dialog
5. wait
6. get the "not responding" dialog

Similar for The Gimp.