He typed in www.va.gov .... there was this popup from Firefox and the line in there said “Get me out of here” with no way of by passing it ... we did the security thing and other stuff ... even IE wouldn’t let him in. I think he just went to Google and typed in VA and I he got in via some link. No problems after. There were a couple of well known sites that FF blocked also.
Usually there is a choice “I know the risks” and you can add an exception. I used to get them a lot, but don’t now, and it was for gov sites. (my son is a vet)