Für die Internet Archive Wayback Machine gibt es eine neue Chrome-Browser-Erweiterung (via Researchbuzz: Firehose bzw. Internet Archive Blogs):
«By using the ‘Wayback Machine’ extension for Chrome, users are automatically offered the opportunity to view archived pages whenever any one of several error conditions, including code 404, or “page not found,” are encountered. If those codes are detected, the Wayback Machine extension silently queries the Wayback Machine, in real-time, to see if an archived version is available. If one is available, a notice is displayed via Chrome, offering the user the option to see the archived page.»
Update vom 17.1.2017, The Distant Librarian: Sorry, the new Wayback Machine extension for Chrome needs some work!