"Avast is harvesting users' browser histories on the pretext that the data has been 'de-identified,' thus protecting your privacy. But the data, which is being sold to third parties, can be linked back to people's real identities, exposing every click and search they've made."
https://www.pcmag.com/news/the-cost-of-avasts-free-antivirus-companies-can-spy-on-your-clicks
That's the price you pay for using a free version of antivirus. Perhaps in most cases its not a big deal, but...
