Huo Tang, H. M. Srivastava, S. Sivasubramanian and P. Gurusamy · 2016 📄 DOI →
We use first-party site metrics to improve navigation: page visits, internal clicks, search result counts (not search terms), and approximate active time. A random tab ID groups events for seven days; GPC/DNT turns this off. The separate visitor count uses a self-hosted pseudonymous fingerprint and also respects GPC/DNT.