merbs writes: The vast majority of websites you visit are sending your data to third-party sources, usually without your permission or knowledge. That's not exactly breaking news, but the sheer scale and ubiquity of that leakage might be. Tim Libert, a privacy researcher, has published new peer-reviewed research that sought to quantify all the "privacy compromising mechanisms" on the one million most popular websites worldwide. His conclusion? "Findings indicate that nearly 9 in 10 websites leak user data to parties of which the user is likely unaware."