I just realized that I have a bunch of plugins for Safari, yet some of them I don't even remember installing. Could sb please tell me if it's safe to delete any of these? I would just like to have the essential ones.. Please see the attached pic - I am not quite sure what use do the ones I marked with a red dot have... should I keep them or can I erase some of them? And why are there so many "Aliases"? Thanks in advance.