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How do I prevent users from enabling cookies?

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We have a family PC, running Windows Vista with Firefox 3.5.9. I am set up as an administrator, and the kids are "standard users". Is there any way I can prevent the kids from enabling cookies in Firefox?

User Agent

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729)

We have a family PC, running Windows Vista with Firefox 3.5.9. I am set up as an administrator, and the kids are "standard users". Is there any way I can prevent the kids from enabling cookies in Firefox? == User Agent == Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729)

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There are a lot of websites that do not work properly if you disable cookies. Why do you want to disable cookies completely?

You can easily let all cookies expire if you close Firefox. To see all the History and Cookie options, select: Tools > Options > Privacy > History: Firefox will: "Use custom settings for history" Tools > Options > Privacy > Cookies: "Keep until": "I close Firefox"