WTF, Firefox?

[wiseheart]

My frigging default browser regularly updates itself, which is good, I guess. However, the latest update resulted in the vanishing of the menu bar from the top of the browser window. Instead, they added a small icon with a scroll-down menu on the right upper corner, which makes things a lot more complicated. For example, searching my browser history and bookmarks have become almost impossible. I went to Settings, in the hope that I might find a way to reinstall the menu bar, but it's waaay above my head. So, if anyone could provide me with idiot-proof, step by step instructions, I'd be very grateful.

WHY DO THEY ALWAYS FIX THAT WHICH AIN'T BROKEN, DAMMIT?!?