Back in the early days of the Internet, when 56K modems were considered state-of-the-art, when the modem was disconnected I could still freely browse the pages that I recently visited because they were kept in the browser's cache.
Now, I cannot find this option, at least not in Firefox.
The Internet was disconnected due to a storm, and I tried to open a Wikipedia page I visited just yesterday, but Firefox could not open it.
I tried "File -> Offline mode", but this didn't help: I got a page showing the message "Firefox is currently in offline mode and can't browse the Web."
Is there a way to make Firefox automatically cache pages I visit, so that I can visit them again without Internet connection?