Open cmd in your working Directory . To Clone the repo paste the following command .
git clone https://github.com/Jackdrakes/t4.git websiteBlockerExtension
Copy the following URL and paste it in any Chromium Based Browser
chrome://extensions/
The following window appears
Enable the developer tools!
Click Load Unpacked in the top-left corner
Select the websiteBlockerExtension folder
Try to visit website like youtube to visit . It won't proceed further.