Simple way for browsing offline in Firefox

My favorite browser is Firefox, and during browsing I visited some webpages that I would like to see again offline. But when I'm disconnected I can't reach those webpages from history, because whenever I click to see them, I get a message saying it's necessary to connect. (I make Firefox offline by selecting File -> Work Offline.)

Saving them (from the File menu and choosing Save Page As) is not a good idea either, because there are a lot and sometimes they don't save properly.

Is there any technique or option in Firefox or tools that make it possible to browse again to a visited webpage when you are offline?

Using File -> Work Offline option you should be able to view pages only if you've visited them before.

Selecting that option forces Firefox to read from the cache. However your cache should have enough space allocated. Check it from Tools -> Options -> Advanced -> Network -> Offline Storage and make sure it is at least 50 MB. Also make sure that you or any other application haven't cleared it because you can't reading anything from an empty cache.

For me the simplest way is the good old CTRL + S which is the shortcut for saving the page. It's quick and reliable, just remember to select Web page, complete (not HTML only). But if you insist not using that then you can use an add-on such as ScrapBook or ReadItLater as suggested before.