That is what I was thinking. This AM, I got on the second PC with FF60. Was able to log into BofA first time OK, but second time I got the website reset notification from FF. I noticed Avast Threat Blocked notice saying Avast aborted the (second) connection due to URL Phising infection.
Googled to BofA and got in OK with new url and bookmarked. However when I manually inputted the url, it was blocked again.
The url which returns the Avast abort & Firefox reset message is www.bankofamerica.com. This is the url which was in my bookmark for years. Secure.bankofamerica.com, which I have now changed to, works.