Microsoft Internet Explorer 8.0 or 9.0

Select the Tools - Internet Options menu item, and then open the Privacy tab - you can then adjust the slider to block or allow various categories of cookie. Alternatively by clicking Advanced... you can exercise finer control over the browser's behavior, choosing whether to accept, block, or prompt for cookies originating either on the website you are visiting (first party cookies) or originating from websites other than the one you are visiting (third party cookies, typically used by banner advertisements hosted on an advertiser's website).

Netscape

Select the Tools - Options menu item, and then open the Privacy tab. In the Cookies section check Accept cookies from sites or you can use the Exceptions... button to override the settings for particular websites.

Firefox 7.0 +

Use the Tools - Options menu item (may be under the Firefox button), then choose the Privacy tab. Set the Firefox will: option to Use custom settings for history. Now you can choose whether cookies are enabled for websites you visit and third party websites, and if so how long they will persist. You can also use the Exceptions button to override the settings for particular websites.

Firefox 3.0

Use the Tools - Options menu item, then choose the Privacy tab. Here you can choose whether cookies are enabled, and if so how long they will persist. You can also use the Exceptions button to override the settings for particular websites.

Google Chrome

Choose Settings on the Customsize and control menu, then open the Under the Hood tab. In the Privacy section, click on the Content settings... button and open the Cookies tab. Set the required cookie behavior and use the Manage Exceptions... button (if required) to configure specific websites.

Apple Safari 5.0

Choose Preferences... on the Settings menu, then open the Security tab. Now set the required cookie behavior.

Note: Disabling cookies will prevent some websites from working correctly, and may mean that you are prompted to re-enter information that would normally have been stored in a cookie.