Facebook is following you

 Meta injecting code into websites to track its users, research says | Meta | The Guardian

“Meta, the owner of Facebook and Instagram, has been rewriting websites its users visit, letting the company follow them across the web after they click links in its apps, according to new research from an ex-Google engineer. The two apps have been taking advantage of the fact that users who click on links are taken to webpages in an “in-app browser”, controlled by Facebook or Instagram, rather than sent to the user’s web browser of choice, such as Safari or Firefox. “The Instagram app injects their tracking code into every website shown, including when clicking on ads, enabling them [to] monitor all user interactions, like every button and link tapped, text selections, screenshots, as well as any form inputs, like passwords, addresses and credit card numbers,” says Felix Krause, a privacy researcher who founded an app development tool acquired by Google in 2017. In a statement, Meta said that injecting a tracking code obeyed users’ preferences on whether or not they allowed apps to follow them, and that it was only used to aggregate data before being applied for targeted advertising or measurement purposes for those users who opted out of such tracking…” It would be a good idea to read the whole article.