XWebBlocker is a free Chrome add-on developed by Xavear. It falls under the category of browsers and specifically the subcategory of add-ons & tools. This handy tool allows users to close all websites that are not included in the whitelist.

With XWebBlocker, users can easily manage their browsing experience by blocking unwanted websites. The add-on provides a whitelist feature, where users can specify which websites they want to allow. Once the whitelist is set, XWebBlocker will automatically close any website that is not on the list.

This add-on is a great solution for those who want to stay focused while browsing. By eliminating distractions from unwanted websites, users can improve their productivity and concentration. XWebBlocker is a convenient tool for anyone looking to streamline their browsing experience and enhance their online productivity.