Was it Facebook? Twitter? Or Google? Maybe even GitHub? Keep forgetting how you signed up for websites as well? Which Login helps you remember how you signed up for a website. How does it work? Let's say you visit a website and decide to sign-up using, for example, Facebook or Twitter the Which Login extension recognizes these logins and stores which provider you used. Later, when you come back to the site, you might be logged out again and would maybe struggle to find the right login. One click on Which Login icon tells you what sign in provider you used in last time. Trouble avoided :)