How to block all websites except a few

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Then add the parameter to the end of the written Target list, with a space in between. You need to right-click on the Chrome shortcut on your desktop, taskbar or start menu and then select Properties. Just a few simple steps are required to add this parameter to Chrome. If you want more than one exception, you can easily add them this way: Using this parameter will redirect all other connection attempts to localhost, while connections to and its subdomains will remain available.