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?