Everything? Every page, every image, including buttons and arrows used for navigating within web pages? All the text including menu links, etc?
If so, the browser's Temporary Internet File cache does that for you. The history file retains each web page address.
I'm not sure what you are attempting to do.
I bought a new laptop fairly recently for one, and one purpose only.... to function as an internet browser and download my experience as I go..
Based on an advert for the post Office (UK) " http://www.youtube.com/watch?v=Ub99ZJw6tJc " i was oFF , all I need now is a way of noting my websites, commenting on what I see via a Right-click menu option and putting in an off line downloader that would download at the end of each session. This is basically the Ultimate History (yes in your top-bar all the time) Option whilst testing Mozilla Firefox 3 Beta 4 (how I give feedback there I dunno).
I suppose as I dunno how todo this successfully anywhere yet I should give it a go here.