Is there such a browser extension now?

Question

Data archiving

Previously, Chrome had one convenient extension called PageArchiver, it allowed with one click to save all open pages in the browser to a separate folder for offline viewing, now there is only the ability to save all open pages to bookmarks. Tell me if there is something similar PageArchiver for Opera or Mozilla ?

Answer 1

https://github.com/gildas-lormeau/SingleFile

Answer 2

I don’t know, I use the built-in function, open the pages from the previous session. Well, or I find the ones I need in the history