Block URLs Domains or Keywords is a Firefox extension designed to enhance productivity by blocking distracting or harmful websites. This subscription-based tool empowers users to manage their browsing experience by allowing them to block specific URLs, entire domains, or any URLs that contain certain keywords. Users can also redirect blocked pages if desired, making it a flexible solution for those looking to minimize distractions while online.

One of the standout features of this extension is its simplicity and efficiency. It operates with low CPU usage and is completely free of advertisements and popups, ensuring a seamless browsing experience. Additionally, it offers four distinct color themes—red, blue, green, and black—allowing for personalization to suit individual preferences. With no data collection involved, users can feel secure while using this tool.