Highlights unread comments in Hacker News threads
This Chrome extension keeps track of which comments you've seen in a given Hacker News thread, and then highlights the new comments when you return to the page. This is useful when you are following an active thread and just want to read what's new. This extension is open source. The source code is available at https://github.com/jbergknoff/hn-comment-highlighter.
- (2016-12-13) Sam: nice, I was going to code this, and then I googled it and found this, does perfectly what it says