Firefox is going to start being more aggressive about blocking slow and invasive trackers by default. This is a great move to speed up the web and make things more secure and private by default. And there’s a way to enable it today.

Long page load times are detrimental to every user’s experience on the web. For that reason, we’ve added a new feature in Firefox Nightly that blocks trackers that slow down page loads. We will be testing this feature using a shield study in September. If we find that our approach performs well, we will start blocking slow-loading trackers by default in Firefox 63.

In the physical world, users wouldn’t expect hundreds of vendors to follow them from store to store, spying on the products they look at or purchase. Users have the same expectations of privacy on the web, and yet in reality, they are tracked wherever they go. Most web browsers fail to help users get the level of privacy they expect and deserve.

In order to help give users the private web browsing experience they expect and deserve, Firefox will strip cookies and block storage access from third-party tracking content. We’ve already made this available for our Firefox Nightly users to try out, and will be running a shield study to test the experience with some of our beta users in September. We aim to bring this protection to all users in Firefox 65, and will continue to refine our approach to provide the strongest possible protection while preserving a smooth user experience.

Deceptive practices that invisibly collect identifiable user information or degrade user experience are becoming more common. For example, some trackers fingerprint users — a technique that allows them to invisibly identify users by their device properties, and which users are unable to control. Other sites have deployed cryptomining scripts that silently mine cryptocurrencies on the user’s device. Practices like these make the web a more hostile place to be. Future versions of Firefox will block these practices by default.

Firefox got really good last year and you should be using it.

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