Firefox 63 blocks tracking cookies, offers a VPN when you need one (Ars Technica)

Ars technica takes
a look at the Enhanced Tracking Protection (ETP) feature in Firefox 63. 'Firefox has long had the ability to block all third-party cookies, but this is a crude solution, and many sites will break if all third-party cookies are prohibited. The new EPT option works as a more selective block on tracking cookies; third-party cookies still work in general, but those that are known to belong to tracking companies are blocked. For the most part, sites will retain their full functionality, just without undermining privacy at the same time.

At least for now, however, Mozilla is defaulting this feature to off, so
the company can get a better idea of the impact it has on the Web. In
testing, the company has found the occasional site that breaks when
tracking cookies are blocked. Over the next few months, Firefox developers
will get a better picture of just how much breaks, and, if it's not too
severe, the plan is to block trackers by default starting in early
2019.' The article also mentions a second privacy-related feature;
the offer of a subscription to the ProtonVPN service.

The Firefox 63 release
notes contain other details.