The updated version of Social Silence II is here. It's a website blocker extension where users can "pin" the extension and input any website URL(server name) like:
www.xyz.com(not https://www.xyz.com/)
getxyz.com (not https://getxyz.com/docs/4.4/getting-started/introduction/)
and then reload the website to temporarily block it. When they want to disable the extension, they can simply click on 'remove'. 
This will help increase their productivity. It will assist users in rendering websites inaccessible, aiding them in focusing on work, study, or other vital tasks, free from the distraction of scrolling through social media feeds.