Reactions is a free Chrome add-on developed by Daniel Lager. This handy tool allows users to quickly check the reactions and discussions about a webpage on Hacker News and Reddit. With just a click, users can access the latest comments and discussions related to the page they are currently browsing.

Using Reactions is simple and straightforward. Once installed, users can activate the add-on by clicking on the Reactions icon in the Chrome toolbar. This will open a sidebar that displays the top reactions and comments from Hacker News and Reddit. Users can browse through the comments, upvote or downvote them, and even join the discussion if they wish.

Reactions is a valuable tool for anyone who wants to stay updated on the online discussions surrounding a particular webpage. Whether you're a developer looking for feedback on your website or a curious reader wanting to explore different perspectives, Reactions provides a convenient way to access Hacker News and Reddit reactions in one place.