Is FocusGuard - Free Site Blocker safe?

FocusGuard reads each page URL and sends it to its service worker for local site-block checks.

Its content script runs on all websites, watches the current URL, and passes the URL to internal extension ports used for focus mode and site blocking. The service worker compares the site against locally stored block lists and redirects matching tabs to the extension's block page. The stored analysis report found no external endpoints for this flow, so no data recipients are listed.