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Click on the „Firefox" menu in the toolbar. In the "Tools" menu select "Options", and then the "Privacy" tab.
In the "Tools" menu select "Internet options", and then the "Privacy" tab.
Click on the „Chrome" menu in the toolbar. Select "Settings" and click "Show advanced settings". In the "Privacy" section click the "Content settings" button.
Click on the „Opera" menu in the toolbar. Select the "Settings" menu and click "Delete Private Data...", and then "Manage Cookies...".
In the "Safari" menu select "Preferences", and then the "Privacy" tab.