Mozilla
recently introduced a patch into its Firefox browser that blocks third-party cookies, and it’s an interesting, long-awaited development. The change stops third parties from putting cookies on your machine unless you’ve ever visited their website, which stops one of the easiest and most direct ways that users are tracked. This third party cookie blocking is something that Safari already does, but according to
Jonathan Mayer (the privacy expert who got Mozilla to make this change), Firefox’s patch is “a slightly relaxed version of the Safari policy.”