I have a Firefox add on that warns me of insecure websites. Just browsed into the John Lewis Website and the following message came up: "This website is secure but maybe infected with ad.adlegend.com. (Comodo DNS: infected) I have never had anything like this before and I have been using the Firefox for some time. Apart from not understanding exactly what it all means, I do realise that it is a warning note, are there any helpful suggestions as to why the alert has come up? Could John Lewsis be infected?