1. in Internet Explorer you can refuse all cookies by clicking “Tools”, “Internet Options”, “Privacy”, and selecting “Block all cookies” using the sliding selector;
2. in Firefox you can block all cookies by clicking “Tools”, “Options”, and un-checking “Accept cookies from sites” in the “Privacy” box.
3. in Google Chrome you can adjust your cookie permissions by clicking “Options”, “Under the hood”, Content Settings in the “Privacy” section. Click on the Cookies tab in the Content Settings.
4. in Safari you can block cookies by clicking “Preferences”, selecting the “Privacy” tab and “Block cookies”.