http://www.technoblogsnmn.ga/2017/08/how-to-block-particular-website-on-my-pc.html?view=classic
Firefox requires an add-on to restrict sites. You can find many good ones at Mozilla.org.
How to block a Website using Google Chrome
- Open your Chrome Web Browser
- Click the wrench symbol in he upper right corner.
- Choose Tools
- Click Under the Hood tab.
- Choose Change Proxy Settings.
- Click Security, click Restricted Sites
- Double click Sites and add the site you want block
How to Block A Website in All Web Browsers
This action will require you to edit your Host file. Your host file is a computer file used to store information on where to find a node on a computer network. For more a more detailed description. Check out this link
In Windows
Click Start->All Programs->Accessories->Command Prompt.
Click Command Prompt This will open a DOS command window.
Type: notepad C:/Windows/System32/drivers/etc/hosts
Locate the line 127.0.0.1 localhost
To block the website google.com for example, just add this text under 127.0.0.1 localhost:
127.0.0.1 google.com
127.0.0.1 www.google.com
You can add as many sites any site, However you will need to prefix it with "127.0.0.1".Save the file
Google will now be blocked in all web browser. This is an advanced but easy method on how to blow a website.