Bookmarks won't export sub folders

Hello, editing Bookmarks is a manual process within Firefox Bookmarks. I would like to export sub folders and edit them on my preferred desktop text editors, then re-import said edited Firefox Bookmarks folder. I have tried Firefox sub folder: * dragging and dropping to Desktop, however fails * copying/pasting to Desktop, however fails * AI promises the world like a conservative politician's gish gallop, but nothing works and wrecks the current setup. I have exported the entire Bookmaks.html file, however editing html to text, then somehow only text remained without urls. So now I have restored from an old 3rd party's bookmarks and need to clean what Bookmarks are left. Sub folder management would be easier than entire Bookkmarks.html.