I mainly use it for the wayback machine. This is very fast, from the page you are on, you click on wayback machine, BOOM a new tab open directly on the wayback machine on the same link !

Perfect

I had yahoo stuck as my default browser and I wanted it off but I couldn't get it off and web archive fixed it instantly back to google. Very helpful.

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An essential extension to retrieve content these days where it's increasingly common to find downed or banned sites. Its varied options for searching on backup and cache services are really excellent.