There are browser extensions like Reddit Check or What Hacker News Says which will show Reddit and/or HN comments on any website you visit. So it's very similar in functionality. Sometimes it can be useful.

href="https://chrome.google.com/webstore/detail/reddit-check/mllceaiaedaingchlgolnfiibippgkmj" rel="nofollow noreferrer">https://chrome.google.com/webstore/detail/reddit-check/mllce... href="https://chrome.google.com/webstore/detail/what-hacker-news-says/khgegkjchclhgpglloficdmdannlpmoi" rel="nofollow noreferrer">https://chrome.google.com/webstore/detail/what-hacker-news-s...

There are more variants of these extensions.