Tried repair, tried uninstall and cleaning with avastclear.exe many times before but I will do it again just for the sake of it.

Now the web shield is using 30-50% CPU with one Firefox tab open while I’m writing this.

Tracked it down to Avast starting scans on my IP cameras which (I guess) never stops. Started scanning cams since today or what? I turn off the camera software (iSpy) and Avast CPU usage is gone. This never happened before. iSpy usually uses 4-5% CPU on my configuration with 4 cameras. Adding camera IP’s to Avast exlusion list does nothing - added to File paths and URLs under global exclusions.

I remember the times of early Avast versions - lightweight, quick, terrible UI and zero problems. Everything is a complete opposite today.