Norton 360 VPN Ad Blocker Not Working

I checked and my Mozilla setting is to block pop-up ads. That hasn't been changed.

I used to see pop-ups constantly on Yahoo, where I have an email account. This stopped when I got Norton 360, started using the VPN, with the Ad Blocker turned on.

If I forgot to turn on the VPN, I would see the pop-ups. When I turned it on, the pop-ups would stop.

This changed last week, for some reason.

The VPN is on with the Ad Blocker turned on. Mozilla is set to  block pop-ups, and yet, since last week, I keep getting these pop-ups. That wasn't the case before last week.

Thanks.

Norton Secure VPN is not an ad blocker - popup blocker. 

Norton Secure VPN -> Ad Tracker Blocking On =
Block advertisers from tracking you online and targeting you with ads. 

Pop-ups in your browser are controlled by a browser setting. 
for example: Edge

How to Block Pop-Up Ads in Your Web Browser
https://www.lifewire.com/block-browser-pop-up-windows-4108710


Malvertising
Malvertising, or malicious advertising, is the use of online advertising to distribute malware with little to no user interaction required.
https://www.malwarebytes.com/malvertising/

Malwarebytes Browser Guard
Filters out annoying ads and scams while blocking trackers that spy on you.
https://www.malwarebytes.com/browserguard/

Browser push notifications: a feature asking to be abused
https://blog.malwarebytes.com/security-world/technology/2019/01/browser-push-notifications-feature-asking-abused/

Adware and PUPs families add push notifications as an attack vector
https://blog.malwarebytes.com/adware/2019/06/adware-and-pups-families-add-push-notifications-as-an-attack-vector/

How to install and run a scan with Malwarebytes (Guide)
https://malwaretips.com/blogs/scan-malwarebytes-anti-malware-2-0/

Remove adware and pop-up ads from browser (Virus Removal Guide)
https://malwaretips.com/blogs/remove-adware-popup-ads/