It's happened to me all week, both Chrome and Firefox.
This is the message I get:
Process: file://C:\Program Files\Mozilla Firefox\...
"More notably, only 1% comes from suspicious or ‘dodgy’ sites – the rest spreads via legitimate websites that have been hacked."
When I Googled "letsconsul.org" Avast goes off again and the page site says it may have been moved. I've set my pop-up blocker to allow then disallow pop-ups, doesn't matter.