Is Block Site: Site Blocker & Focus Mode Safe? — Extension Safety Profile

This extension requests storage, tabs, alarms, and webNavigation permissions—all normal for a site blocker and focus tool. The tabs permission lets it read the URLs of open tabs to compare them against your block list, while webNavigation helps intercept navigations before a page loads. Alarms enable timed focus sessions, and storage saves your rules locally. No host permissions are listed, but the tabs permission already grants broad visibility into the sites you visit, so the requested access matches the extension’s purpose.

Site blockers inherently need to monitor your web activity, which means they can collect your browsing history. The developer declares this data is not sold or used for unrelated purposes, but any tool in this category requires trust. A careful user should ensure the publisher is reputable, verify that the privacy policy is clear, and remember that even a well‑intentioned extension could become a risk if it were compromised or sold.

The fact sheet highlights a strong Maintenance & Ownership score of 100%, showing the extension is actively maintained and recently updated, which reduces the chance of abandoned, vulnerable code. The weakest dimension is Publisher & Identity at 60%, suggesting less transparency about who stands behind the software. Users can take reassurance from the prompt updates but may want to check the publisher’s website and look for other trust signals before installing.