> A Trojan introduced in Firefox to track users' browsing behavior, history and so on, in order to provide this data to advertisers, which users are actively blocking through extensions. A disaster.

If I've understood this correctly it only provides data if you (1) see an ad, and (2) later visit the advertiser's site. If you have an ad blocker that stops #1 then there shouldn't be any data if you later happen to visit the advertiser's site.

Also, the only information given to the advertiser is that you saw their ad before you visited their site.