Firefox scam
Self and SWMBO use two separate desktops, both W7 64bit. Were both using Firefox as browser. A couple of days ago SWMBO's attempt to log in to FF produced total red screen with message to " 'phone an 0800 number as there had been an attempt to obtain bank details" or some such tosh. Nothing similar on mine. SWMBO can log on via IE with no problem. We use the same router. Malwarebytes doesn't pick up anything , nor does Avast. Have tried uninstalling FF and re-installing but similar result. Does anyone have any helpful advice, please?
TIA