Managing cookies
You can choose to refuse the storage of cookies on your device by changing your browser settings. You can also delete cookies that are already stored on your device. Here are the instructions for clearing cookies in various browsers:
Google Chrome: Menu → "History" → "Clear browsing data". In the popup window, select "All time" next to "Time range". Check the box next to "Cookies and other site data". Click "Clear data".
Safari: Preferences → "Privacy" tab. Click "Manage Website Data" under the "Cookies and website data" section. Click "Remove All".
Opera: Settings → "Privacy & security" → "Clear browsing data". In the new window, select "Cookies and other site data" and "All cookies and site data". Click "Clear browsing data".
Mozilla Firefox: Menu → "History" → "Clear Recent History". In the "Time range to clear" field, select "Everything". Click the arrow next to "Details" to see the list of items. Check the box next to "Cookies" and make sure other items you want to keep aren’t selected for deletion. Click "Clear Now".
Internet Explorer: Tools → "Internet Options" → "General" tab → "Browsing history" section → "Delete...". Select "Cookies and website data". Make sure other items you want to keep aren’t selected for deletion. Click "Delete".