If set to “after-current-tab”, then new tabs are inserted after the current tab. If set to “end”, then new tabs are appended to the end of the tab list.
Speed tradeoff for when to show the number of items in a folder. If set to “always” then always show item counts, even if the folder is on a remote server. If set to “local-only” then only show counts for local file systems. If set to “never” then never bother to compute item counts.