I wrote a greasemonkey script for keeping track of read posts: https://greasyfork.org/en/scripts/6955-hacker-fresh https://greasyfork.org/en/scripts/6955-hacker

I wrote a greasemonkey script for keeping track of read posts: https://greasyfork.org/en/scripts/6955-hacker-fresh https://greasyfork.org/en/scripts/6955-hacker-fresh Though, I don't even use it myself anymore, I just gave up caring if I've seen all the replies in a thread.