In the name of cybersecurity and privacy, Mozilla has decided to block third-party trackers by default.
Any web cookies that advertisers attempt to install on your device through Firefox will be blocked. This holds true for any instance of Firefox browser downloaded from this point onwards.
Compared to the competition, Mozilla is not the first one to make such a move. Since 2014, Safari has been doing the same. Chrome has also taken a couple of steps towards limiting cookies. That being said, since a large portion of their business model depends on web advertising, it’s unlikely they will follow in Mozilla’s footsteps and make such a drastic move in the foreseeable future.
In any case, this matter is far from being simple and straightforward; due to third-party trackers being disabled, some websites might break. This is the reason why Mozilla is not disabling these types of cookies for everyone; only in the newly-downloaded program instances.
If you want to manually activate it, here’s what you should do. First, open up the menu. Then, find the Content Blocking section. After that, configure your privacy settings. That’s all!
In any case, what does Mozilla’s move mean in practice? In commonly used terms, ads won’t follow you around anymore. Recent research suggests this is making many users uncomfortable and they feel that their privacy is being invaded. Mozilla’s dramatic decision resolves the vast majority of the problem.
Additional information regarding the changes is available on Mozilla’s content blocking support page.