Only allowing access to certain web pages in either IE or Chrome

I have a large retail client that occasionally get viruses on their in store PC's because employees surf the net when they aren't supposed to. The PC's require that employees access the internet in order to look up information. However, the employees only need to access 4 sites to do their job. They are using Chrome now but I can put them on IE or Firefox or even Safari.
My question:
Is there any way that I can set it any of the above browsers so that employees ca only access those 4 sites?
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What type of firewall is in place at the sites?  Are the users logging into a domain?
Paul WilsonCommented:
You can do this using google chrome extension which limits the user to access specific or those web pages that are allowed to access. For more information see this:
download kurupira free webfilter from, this is very easy to use with multiple options.
in your case add the 4 websites under the allow section and everything else will be blocked.

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Mohieb MohammadSolutions ArchitectCommented:
is the store computers joined to domain or in a workgroup
vlogg5Author Commented:
Paul, The reviews  about the Chrome extension are pretty poor. It doesn't work.
write4zia, Thanks. Kuripira works great.
wc buddy.... ;)
Paul WilsonCommented:
ok i will try to provide you much better solutions in future :)
vlogg5Author Commented:
Thanks Paul
You are welcome write4zia
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