With the power of the Wayback Machine, you can go back in time to see how a website has changed and evolved through the history of the Web.
Dead pages, broken links, the scourge of the internet. Powerhouse sites like Slashdot and Digg can bring a server to its knees. What do we do when a page is dead but we still want to see it? Call in the clerics, and perform a resurrection ceremony!
Fierr is an extension for Mozilla Firefox that replaces the default error page with a useful, visually appealing page with three buttons: Back, Reload, and Search. The background image of the error page is a high quality 500x500 logo matching the product.
When you see the 404 not found pages while you are searching something, you can directory go to the backup page with "Wayback Machine extension". You may find web cache with this extension from The Internet Archive, Google Cache, Yahoo Cache, MSN cache(Bing Cache)...Discontinued
The extension is no longer updated. Last version, 0.4, released in June 2011, can be still downloaded from the Chrome Web Store.