How can I make the content of a website available off-line? In the "old days" this was common, and built in to web browsers. A whole site could be downloaded and all links too 2 or 3 levels deep. Then the content would be available when not online. Changes would sync periodically. I've searched addons but nothing ("Download Them All" is a start, but only gets links one level deep from the page you're on at the time.)

Thanks!