404. That’s an error.
The requested URL /_/+1/confirm?hl=de&url=https://kwerfeldein.de/2013/01/20/browserfruits-januar-3/ was not found on this server. That’s all we know.
/_/+1/confirm?hl=de&url=https://kwerfeldein.de/2013/01/20/browserfruits-januar-3/