Is advertising with tracking cookies halal or haram?

Todays internet ads mostly using tracking tech with cookies, to collect data from internet user to get their interest, and then send ads to them based on this collected interest. This ads is very much personal, it's on point (not just random ads), because its cookies is always following you collecting data. A lot of people consider this breach of privacy. Is this halal or haram? I'm planning to use FB ads to sell items using its ads, which also using tracking tech similar to what I mentioned above.