Firefox 128 Criticized for Including Small Test of 'Privacy-Preserving' Ad Tech by Default

"Many people over the past few days have been lashing out at Mozilla," writes the blog Its FOSS, "for enabling Privacy-Preserving Attribution by default on Firefox 128, and the lack of publicity surrounding its introduction." Mozilla responded that the feature will only run "on a few sites in the U.S. under strict supervision" - adding that users can disable it at any time ("because this is a test"), and that it's only even enabled if telemetry is also enabled. And they also emphasize that it's "not tracking." The way it works is there's an "aggregation service" that can periodically send advertisers a summary of ad-related actions - again, aggregated data, from a mass of many other users. (And Mozilla says that aggregated summary even includes "noise that provides differential privacy.") This Privacy-Preserving Attribution concept "does not involve sending information about your browsing activities to anyone... Advertisers only receive aggregate information that answers basic questions about the effectiveness of their advertising." More from It's FOSS:Even though Mozilla mentioned that PPA would be enabled by default on Firefox 128 in a few of its past blog posts, they failed to communicate this decision clearly, to a wider audience... In response to the public outcry, Firefox CTO, Bobby Holley, had to step in to clarify what was going on. He started with how the internet has become a massive cesspool of surveillance, and doing something about it was the primary reason many people are part of Mozilla. He then expanded on their approach with Firefox, which, historically speaking, has been to ship a browser with anti-tracking features baked in to tackle the most common surveillance techniques. But, there were two limitations with this approach. One was that advertisers would try to bypass these countermeasures. The second, most users just accept the default options that they are shown... Bas Schouten, Principal Software Engineer at Mozilla, made it clear at the end of a heated Mastodon thread that "[opt-in features are] making privacy a privilege for the people that work to inform and educate themselves on the topic. People shouldn't need to do that, everyone deserves a more private browser. Privacy features, in Firefox, are not meant to be opt-in. They need to be the default. "If you are 'completely anti-ads' (i.e. even if their implementation is private), you probably use an ad blocker. So are unaffected by this." This has already provoked a discussion among Slashdot readers. "It doesn't seem that evil to me," argues Slashdot reader geekprime. "Seems like the elimination of cross site cookies is a privacy enhancing idea." (They cite Mozilla's statement that their goal is "to inform an emerging Web standard designed to help sites understand how their ads perform without collecting data about individual people. By offering sites a non-invasive alternative to cross-site tracking, we hope to achieve a significant reduction in this harmful practice across the web.") But Slashdot reader TheNameOfNick disagrees. "How realistic is the part where advertisers stop tracking you because they get less information from the browser maker...?" Mozilla has provided simple instructions for disabling the feature: Click the menu button and select Settings. In the Privacy & Security panel, find the Website Advertising Preferences section. Uncheck the box labeled Allow websites to perform privacy-preserving ad measurement.

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