How is your Facebook password the same as Messenger?

They're the same password because they're both by Facebook. The technical answer would be that Messenger uses Facebook's OAuth2 authentication mechanism to verify the user's credentials. OAuth2 enables single-sign-on capabilities for multiple applications. read more

because Facebook and messenger are the same company and the apps are linked makes it easier for users to login the only time it logs you out is if your banned or on Facebook probation or account deletion or change of password or other information. or account hacked or password has expired. read more

Hi Tom, yes, it will kick them out from messenger and ask to relogin using the new password. If you dont want this to happen then you may change your password thru forgot password then validate with your email wherein you will have an option to keep login so that for those devices wherein your account has already login is you dont need to relogin using the new password. read more

As your passwords are private to you, you are the only person who can answer your question. Yahoo and Facebook are separate sites so the only way the passwords would be the same is if you set them up that way. read more