Mozilla announces Firefox will block trackers by default

Image result for firefoxMozilla today announced that Firefox will soon block web trackers by default. In conjunction, Firefox will also let users control what information they share with sites.

Web trackers are used mainly for targeted advertising and broad user data collection. Mozilla wants to protect users from websites using abusive trackers, improving both performance and privacy.

Mozilla shared details on three tracker-blocking features it is building into Firefox:

  • Blocking trackers that slow down page loads. This feature, aimed at improving page load performance, will be tested in September. If it performs well, Firefox 63 (slated for October 2018) will start blocking slow-loading trackers by default.
  • Removing cross-site tracking that follow users around the web. This feature, which strips cookies and blocks storage access from third-party tracking content, will be tested with some Firefox beta users in September. Mozilla plans to bring this protection to all users in Firefox 65 (slated for January 2019).
  • Mitigating harmful practices such as trackers that fingerprint users (to identify users by their device properties) and cryptomining scripts. Mozilla didn’t share when future versions of Firefox will stop these practices, but it did say they will also be blocked by default.

Just like how Google sees Chrome blocking some ads by default, Mozilla views Firefox blocking trackers as an extension of the pop-up blocker. Here is the company’s reasoning for the decision:

Some sites will continue to want user data in exchange for content, but now they will have to ask for it, a positive change for people who up until now had no idea of the value exchange they were asked to make. Blocking pop-up ads in the original Firefox release was the right move in 2004, because it didn’t just make Firefox users happier, it gave the advertising platforms of the time a reason to care about their users’ experience. In 2018, we hope that our efforts to empower our users will have the same effect.

Mozilla wants to make it clear these features are aimed at users, and websites will have to adjust accordingly.

Try it now in Firefox Nightly

Firefox development starts with Firefox Nightly, which consists of the latest code packaged up every night for bleeding-edge testers. The first two protections are already available in Nightly — you can control both features from the Control Center menu (left-hand side of the address bar), where you’ll see a new “Content Blocking” section.

Here you can enable the blocking of slow-loading trackers or cross-site tracking through third-party cookies by clicking “Add Blocking…” next to the respective option. Check “Slow-Loading Trackers” to improve page load performance and/or check “Third-Party Cookies” and select “Trackers (recommended)” to block cross-site tracking cookies. Even in Nightly, these features still need to be enabled, but eventually they’ll be on by default.

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