Is that something other than the "Bookmarks Toolbar" or the "Menu Bar" (which includes a bookmarks drop-down) that I can enable by right-clicking on the empty space in the toolbar?
I'm not sure what he's talking about either. I just upgraded and shockingly my menubar/bookmarks configuration was preserved. It looks a little tight but it's still arranged how I had it.
This might be too much for you, but if it's looking too tight, note that there's also a Density menu at the bottom in the customisation screen that lets you widen the interface (including, presumably, the bars).
I have my density set to compact, changing it affects the vertical space of everything except the bookmarks and menu bars. They remain incredibly tight.
Is that something other than the "Bookmarks Toolbar" or the "Menu Bar" (which includes a bookmarks drop-down) that I can enable by right-clicking on the empty space in the toolbar?