I just got my first Apple Imac after many years of using Windows machines under various flavors of Windows and running Firefox in all of them. I downloaded Firefox for the Mac but when it runs there is no menu bar up the top of the screen so I can't set it up the way I wan, for example I can't set it to save tabs of closing down, can't change to download folder etc. I searched the Firefox web based help files and there are several posts that say holding down the alt key (I think that's the key, but my memory is not perfect) but even following all the suggested cures nothing worked. Does anyone know how to fix the problem? Firefox works okay apart from that problem. Thanks in advance.