How to block a specific website or a group of websites in Google Chrome?
Check the detailed 3 steps below.
you’re free to use Google Chrome online window to access various websites.

This tutorial offers a step-by-step guide.
It is a free Chrome extension.
Block Site allows you to block specific web pages or the entire website.

It also offers an Android app BlockSite letting you block websites on Chrome in Android mobile phones.
you’re able to firstly check how to block a website in Google Chrome on Windows 10 computer.
Step 1.

Install Block Site Chrome Extension
TheBlock Site Chrome extensionis available in Chrome Web Store.
At first, you’re able to download and add this extension to your Chrome web app.
Step 3.
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Then, you cant access those websites in Chrome in the list of blocked sites.
This guide shows you how to open and use Google Chrome task manager.
3 steps to open Chrome built-in task manager to view and control Chrome running processes.
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Step 1.Open Google Play Store, find and install BlockSite app on your Android phone.
Step 2.You may need to go toSettingson your Android phone, and clickAccessibility -> BlockSite.
Enable BlockSite app to let it block websites for you later.
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Step 3.Open BlockSite app again and poke the green + icon.
Input the website address and nudge the green checkmark icon at the top-right corner.
This will add this website to the blocked sites list.
You cant access this site in Google Chrome or any other browsers on your Android phone.
If you need, you might also opt for Trash icon to unblock the website anytime you want.
The BlockSite app on Android also lets you block an entire app by click APP icon.
This post lists 5 best free pop up blockers for Firefox.
Check the step-by-step guide.