I know I can save web pages and convert them in Calibre to EPUB. But over at the Mozilla Add-Ons forum for firefox I've added a request for a "
Save as (Save selection as) EPUB" add-on.
I see it as more useful snapshotter than save as pdf, and streamlines my processes, particularly if there was "save selection" option (which added original URL to the metadata).
I'm cross-posting it here in case forum members regard it as an idea worth supporting.