Automatically highlights new comments and collapses threads without new comments when you revisit an item's comments on Hacker News. New comment counts since your last visit are displayed on item listing pages. Also includes other tweaks for comment threads.
I made this extension to "finish off" Hacker News' comment threads (drawing the rest of the friendly owl if you will, hence the silly name) by adding an important missing feature - being able to quickly see which comments are new when you revisit an item.
For years, I'd been unable to follow comment threads in a satisfactory way on repeat visits, searching for "minutes ago" or "1 hour ago" to find recent comments.
This extension does that work for you - new comments since your last visit are highlighted and comment threads which don't contain any new comments are automatically collapsed. Item lists will also show you when there are new comments, and the number of new comments.
Comments Owl for Hacker News
No-Code Tees by Maker Threads