The "hckr news" extension handles this well: http://hckrnews.com/about.html#extensions http://hckrnews.com/about.html#extensions It highlights new comments on

The "hckr news" extension handles this well: http://hckrnews.com/about.html#extensions http://hckrnews.com/about.html#extensions It highlights new comments on the http://news.ycombinator.com http://news.ycombinator.com pages, and shows the number of unread comments on the alternate http://hckrnews.com http://hckrnews.com front page. It's available for Safari and Chrome. The Chrome extension works fine for Opera (and likely other Chromium based browsers).