Click on Safari and select Preferences.
Click on the Security tab.
Under Accept Cookies, ensure that Only from sites you navigate to is ticked.
Close the window.
Quit/exit Safari after you change settings and then re-start the application.
Click on Firefox and select Preferences.
Click on the Privacy tab.
Under Cookies, ensure that Accept cookies from sites is ticked.
Close the window.
Quit/exit Mozilla Firefox after you change settings and then re-start the application.