I'm running FF (33) on Linux and I have to use the addon bar module to use the noscript icon. If I place the NS icon on the top bar the menu is once displayed downward and always upward after this first display. The problem has been mentioned before : viewtopic.php?f=10&t=19609 but it's slighly different for me because it's always on the wrong side.
An option to force the menu going downward would be perfect !
NS icon on top bar with FF in fullscreen, the menu is hidden beccause it goes upward

NS icon on top with FF window detached, full menu displayed

NS icon on the addon bar, full menu
