The Official Wayback Machine Extension:

In cooperation with Google Summer of Code, The Internet Archive presents The Official WayBack Machine Extension. With the power of the WayBack Machine, we let you go in time to see how a URL has changed and evolved through the history of the Web!

Features

• Save Page Now
Allows you to instantly save the page you are currently viewing in The WayBack Machine.
• Recent Version & First Version
View the most recent, and the first version of a page, in the WayBack Machine.
• Alexa & Whois
gives analytical information about the page you are currently viewing, along with interesting facts, such as who owns it and how popular it is.
• Tweets
Searches Twitter For information Regarding your current page.

Copyright Internet Archive, 2017 AGPL-3 
Credit

Caceres Richard @rchrd2
Chinta Rakesh N @rakesh-chinta
Das Abhishek @abhidas17695
Mark Graham J. @markgraham
Mandel Benjamin @BenjaminMandel
Shiryaev Anton @Eagle19243
Yogesh Kumar @kumarjyogesh 
Banos Vangelis @vbanos 
Rodden Kerry @kerryrodden for sunburst code (used in the Site Map)

Support

info@archive.org