[keycloak-user] Browser not maintaining session for keycloak users

[Test Oauth]

I am using openid-connect for authenticating users. After successful
authentication, browser windows says:
"Login Successful

You may close this browser window and go back to your console application."

However, even without closing the window if I relaunch my application
(using keycloak.loginDesktop();) even within 10 seconds, still the login
page appears instead of : you are already logged in.

Browser: Firefox.