It would be useful to start recording scroll-position data, and we've been thinking about doing this as part of EoC. However, even if EoC is disabled we would probably find this scroll-position data valuable, so we should probably collect it independently of Explore on Content. See issue 843660 for the EoC version of this work request.
We could add a UMA percent histogram for the most advanced scroll position the user got to on each tab. We could also add a UKM metric, which would allow us to correlate individual pages with how much folks read on them.
Tagging Becky as owner for now.
Comment 1 by donnd@chromium.org
, May 31 2018