Hello @Bogo, thank you. Interesting idea that opening a folder closes all others at same level .. I'll look at adding it as an option.

On the other one, yes this is planned, it's going to come soon now -> https://github.com/aaFn/Bookmark-search-plus-2/issues/31

aaFn

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Version 2.0.71 is now published, with the possibility of expanding all folders and closing all folders as an Advanced submenu in the context menu.