When I visit VX-Vault/URL and try some URL's, I get a blank screen when navigating to these domains
When I install Bitdefender Traffic Light for example (you can also try Avast, Emsisoft or Comodo safe surfing extensions) I often first get the block screen of the AV-extension followed by the red screen of WD-smartscreen.
So these extensions trigger something to disaply the smartscreen warning screen. This WD-popup is not triggered when they are not installed. Please chek