Twitter Reaction Counter is a free Chrome extension developed by Kosk. This extension allows users to easily analyze the number of likes and retweets on a tweet. With just a few clicks, users can view the user list of likes and retweets in a convenient table format.

To get started, simply click on the likes or retweets on a tweet, and then click the "Getting Like/Retweet" button on the extension's popup. The extension will retrieve the list of users who have liked or retweeted the tweet, and the number of users will be displayed on the extension's icon.

It's important to note that this extension can only retrieve the list of users that are currently displayed on your browser. If you want to get more likes and retweets, you will need to scroll down the list on the tweet page.

Once you have gathered the desired data, you can click the "View Results" button on the extension's popup, and a new tab will open. In this tab, you can view the user list along with their name, display name, whether they follow you, and their bio.

Overall, Twitter Reaction Counter is a useful tool for those who want to analyze the engagement their tweets receive. Whether you're running a giveaway or simply curious about the reach of your tweets, this extension provides a convenient way to gather and analyze data.