https://www.theregister.co.uk/2019/12/04/avast_avg_mozilla_takedown/

The Firefox extensions built by Avast have been pulled from the open-source browser's online add-on store over privacy fears.

Adblock Plus founder Wladimir Palant confirmed this week Mozilla has taken down the Avast Online Security and Avast-owned AVG Online Security extensions he reported to the browser maker, claiming the code was snooping on users' web surfing.