This is still not as powerful as my one, simple trick to handle all bookmarks, ever: Print to PDF. I've been doing it since last century, and I have 10's of thousands of PDF's of every single web page I've ever found interesting, sitting right there in a directory on my computer. Its indexable, searchable, grok'able, available off-line, allows me to harvest data without fuss, and gives me access to anything I can rem…
HTML largely beats PDF for this use case. And if you want something that produces a file in which you can easily extract resources from the saved page, see [1]. There is an option to automatically save the pages you add to your bookmark. There's also an option to make the text of the files indexable without unzipping them.