What are you missing on your Mac? It has the system title bar, the system-provided x, -, and + buttons, and (on my Mountain Lion, at least), the system-provided full-screen button in the top-right. What more could there be?
A full height title bar with the title of the current tab in it that I can use to drag the window around. Having to precisely aim my mouse pointer in order to drag my window is extremely annoying.