This is one of those features that should be ON by default. If its OFF by default, then this wont be adopted by advertisers, thus letting the internet continue down its dark, invasive, malicious path. Firefox is taking a chance here at making the entire internet better than it was before.

Those that are upset by this feature being enabled by default have the right to be upset about it. Totally fine with that, and I get it. I just think its also fine that Mozilla inconvenienced those people in order to push this. They could have communicated it more clearly than they did, but overall, this seems like a tool that I hope advertisers can get behind rather than the aggressive tracking methods they currently deploy.