Block tracking feature is now behind the premium paywall which makes free version of Avast Online Security & Privacy add-on useless when safe searches is pretty much only useful feature that is left.

Bon produit. Aucun ralentissement de mon activité. Jamais de problème.

This extention got automatically downloaded by Avast.

Quiet and unobtrusive add-on to accompany an excellent anti-virus software package. I have never had a slightest issue with the add-on on any version of Firefox. Sincerely recommended.