The extension calculates the total amount of likes and comments for a specific Instagram account, and group them by likers/commenters. It will help you to find the most engaged users with a specific Instagram account. The generated list could be exported to CSV/XLSX file.
Please read https://medium.com/helpertoolsforig/count-likes-comments-by-helper-tools-for-instagram-google-chrome-extension-coming-soon-56c87b3bee86 to find how to use the extension.