Before I leave this interesting thread, I would emphasise the following -
1. Avast AV free does apparently include "Security Browser extension".
See - top item, second column -
2. All I can say is that it cannot be the same as my AOS extension.
3. If I disable my AOS, the Adware tracking cookies flood in.
4.
IF the Security Browser Extension
was the same as AOS, this would not happen.
5. Conclusion - Avast AV free does
not include the Avast Online Security extension.