URL Blocker is a free Chrome add-on developed by dustbin. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This program allows users to block URLs by defining a blacklist using regular expressions.

With URL Blocker, users can easily prevent access to specific websites by creating a blacklist of URLs. The program utilizes regular expressions, which provides users with a flexible and powerful way to define patterns for blocking URLs. This means that users can block not only specific websites but also entire domains or patterns of URLs.

URL Blocker is a valuable tool for those who want to enhance their productivity or maintain a distraction-free browsing experience. It can be particularly useful for individuals who struggle with self-control or need to restrict access to certain websites for various reasons.

Overall, URL Blocker is a straightforward and efficient Chrome add-on that allows users to block URLs by defining a blacklist using regular expressions. It provides a flexible and customizable solution for managing website access and can be a valuable tool for improving productivity and focus.