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.
