Default browser settings are recommended !
If you are using tools to tweak the browser settings - please check them as well (preferably never ever use them)

Firefox:

[x] Cookies must be accepted. - required

[] Accept third-party cookies - possible, but not necessary.



Chrome

[x] Allow local data to be set (recommended) - required

[] Keep local data only until I quit my browser - possible

[] Block sites from setting any data - don't check !

[] Block third-party cookies and site data - possible