On OS X, Firefox 50's title bar is full-sized and blank. Totally empty and wasted. I can't find any way to hide it or shrink it, and I need it to move the window. There's no Windows-style options button and I don't want one. I just want it to contain something useful -- the title of the page I am looking at. I often have 80+ tabs and even with my vertical tab bar, they are not all visible. With horizontal tabs, they shrink to illegibility. I do not understand why this useful feature was removed, making the title bar a waste of useful space.