Off-Facebook Activity
This is the clear history feature that was announced a year ago: <a href="https://news.ycombinator.com/item?id=16969325" rel="nofollow">https://news.ycombinator.com/item?id=16969325</a>. See also the engineering post that explains some of the challenges in implementing this: <a href="https://engineering.fb.com/data-infrastructure/off-facebook-activity/" rel="nofollow">https://engineering.fb.com/data-infrastructure/off-facebook-...</a>