It can take many closing clicks to get rid of this warning and comes back again after a short while. What should I do? Tried searching with Malwarebytes itself and found no problems. Web search the same.

Malwarebytes Website blocked due to malvertising If you don't want to block .................................. IP Address: 108.62.60.42 port: 443 type: Outbound file: c:\Program Files\Mozilla Firefox\firefox.exe