Up to the three bars seemed to be the trick. Customise tool bar. Hooray! Masses of things you can put on your toolbar. There's histories. But where to drag it? Wherever I drug it, it's there, in some kind of mysterious place that humans can't get to. I can't get it, or another, back. Histories, is history. Gotta larf.
So, I'll do it with Bookmarks. Wiser this time, I right clicked and selected the Toolbar. Bookmarks may well have joined Histories, but it's gone. But perhaps another day. Maybe I'll awaken, and all this will be a bad dream.
Worse still, when I click the three bars again, at the top, instead of Customise Tool Bar, there is my name. I know my name, though that is probably temporary. Sigh.