Using Google's products and services has always been fundamentally precarious—doing so gives the world's largest advertising company a lot of juicy personal data. Google has long said it won't use the sensitive data from products like Gmail, Drive, and Photos for ad personalization, but a change to the company's privacy policy appears to dismantle that firewall.

On October 16, Google issued an update to its privacy policy, spotted by Android Authority. The ad personalization section used to include a clear limit on data from certain apps. "We don’t show you personalized ads based on your content from Drive, Gmail, or Photos," the document said. Now, Google has updated it with the following language.

Updated language on when your sensitive data might inform ads. Credit: Google

This equivocation opens the door to using data from apps like Gmail and Photos in ads when it's shared with other Google services, and it just so happens Google has a mechanism for doing that, with Personal Intelligence. The company released Personal Intelligence in early 2026, allowing users to hand data from multiple apps to Google AI products. The idea is that the added context from your existing data will lead to better AI answers, but it's also proving to be a privacy minefield.

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Smart TVs running operating systems from Samsung, Vizio, and Roku continue sending data to automatic content recognition (ACR) endpoints after users opt out of tracking in the devices’ settings, according to research published on Monday. The paper from Northeastern University researchers points to potential privacy violations from some of the biggest TV brands.

ACR captures video screenshots or audio clips from smart TVs and sends the data to remote servers, where it's used for things like measuring content viewership and serving targeted ads.

The paper, "Watching the Watchers: Privacy Analysis of US Smart TV Automatic Content Recognition," examined eight smart TV OSes across 12 smart TVs from 10 manufacturers (Amazon, Hisense, LG, Roku, Samsung, Sony, Supersonic, TCL, Vizio, and Westinghouse) to examine when smart TVs use ACR and how effective opting out of user tracking is.

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Muse, the new general-purpose AI agent from Meta, can expose sensitive information when users share conversations through web links, researchers reported Monday. In response to questions from Ars about the behavior, Meta said it's suspending the sharing feature while the company reviews it and considers making changes.

Like many online services, Muse has allowed users to share searches, conversations, images, and similar content with other people. Such share features usually involve clicking an option to create a unique URL that anyone can use to load a page hosting the content. To keep potentially sensitive information from being accessible to unintended people, the URLs typically contain a long sequence of text that can’t be easily guessed.

A single query is all that's required

Muse, which Meta CEO Mark Zuckerberg said last month was “built from the ground up for privacy and security,” seems to take the same precautions. But a central design decision for constructing URLs has made the links easy to discover. As a result, researchers from security firm Claroc said they were able to enumerate 6,800 links Muse users created for sharing conversations with others. After opening a few hundred of them, the researchers found information that was clearly not intended to be publicly available, including:

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