I do the same as huckles888. I open several
ebay pages open to different categories with no problems whatsoever. I am automatically logged in on any new page (tab?) I open if I am already logeed in on the first one I open. But is this really what you are asking about, KGV? There is some kind of synchronization because if I add to my watch list on one tab, the watch item also appears all other
ebay tabs I have open. I am not sure I am using the correct terminology but I hope you all get the idea of what I am saying. I do not know how it will work with listing items.