Chrome

1. In the upper right hand corner, select the Menu, choose More Tools, and select Clear browsing data…
   
2. In the Clear browsing data popup, choose a time range like 'All time'
   
3. Ensure the check boxes are selected for Cookies and other site data and Cached images and files 
   
4. Click the button marked 'Clear data'
   
5. Alternatively, enter chrome://settings/ in your browser URL bar then select Privacy and Security from the left menu
   

Firefox

1. In the upper right hand corner, select the Menu, choose Settings, and in the page that loads, select the Privacy & Security menu.
   
2. Under Cookies and Site Data, select Clear data...
   
3. Ensure the check boxes are selected for Cookies and Site Data and Cached Web Content 
   
4. Select Clear
   
5. Alternatively, enter about:preferences#privacy in your browser URL bar then under Cookies and Site Data click the Clear data button
   

Safari

1. In the upper left hand corner, select the Safari, choose Preferences, and select the Privacy tab.
   
2. Under Cookies and other website data, select Remove All Website Data
   
3. Select Remove Now

iOS (Safari)

1. From the home screen, tap the Settings button
   
2. On the Settings screen, scroll down and tap the Safari button
   
3. Under the ‘Privacy’ section of the Safari screen, tap the button labeled Clear History and Data
   
4. On the confirmation screen, tap Clear Cookies and Data
   

Android

1. Open the browser and click the Menu button on your phone. Tap the More option
   
2. Tap Settings
   
3. Scroll down to the Privacy settings section and tap the Clear cache option.
   
4. Now tap the Clear all cookie data option.
   
5. Select OK.