Is Chrome extension for Kakao login check safe?

Displays Kakao OAuth authorization URL parameters for checking callback-related settings.

This extension shows parameters from specific Kakao authorization-code request pages in a popup, including the callback URL and the authorize parameter list. The description says it can also be used to check a permalink original address and an ad-view signup address. It notes that the extension’s service worker must be enabled in Chrome’s extension management page for the popup to appear during Kakao login.