I recently switched over from Chrome, and while I could find stuff in the about:config menu for keeping the bookmarks dropdown open after CTRL-clicking a bookmark, and having individual bookmarks open without changing the active tabs, opening a folder of bookmarks seems to ignore this setting and always sets the first bookmark from that folder to be active. I think having another boolean in the configs to choose whether or not to preserve this inconsistency would allow us Chrome migrants to retain our muscle memory on this matter without disrupting those who expect the tab to change.