<p>Is there a way to show IE/Firefox Back button style, dropdown menu button?</p>

Sure.  Put a toolbar on the page.  Right-click on the toolbar, add a button. Set the button's style to tbsDropDown.  Put a PopupMenu on the page.  Double click on the PopupMenu to define menu items.  Then, go back to the button you created and set its DropdownMenu property to point to the PopupMenu you just created.