ESUIT | IDFinder for Facebook™ is a free Chrome add-on developed by FBES. This add-on offers an easy way to find user IDs on Facebook. After installation, simply reload your Facebook tab and you'll be able to find the user's Facebook ID on their profile or hover card. With just one click, you can copy the ID and use it as needed.

In addition to the main feature, ESUIT | IDFinder for Facebook™ also provides some additional features in a popup. These include a link to find more extensions developed by ESUIT, an option to support future updates and maintenance by buying the developers a cup of coffee, a bug reporting feature to assist in resolving any issues, and an option to rate the extension on the Chrome Store.

It's important to note that ESUIT | IDFinder for Facebook™ is an independent project developed by ESUIT, and it is not officially developed by Facebook™. The author of the extension is @William Chen. If you have any feedback or experience any issues, you can reach out to the developers on their Facebook page.