Then you forget that you gave them access to your Netflix account until you start seeing some weird movie recommendations. They don’t have a Netflix account and want to watch the latest and greatest movie, so you share your account with them. If you have saved your password in the browser, it will autocomplete that field when you type the username.Ever share your Netflix login credentials with a friend or family member? You know how it happens. If you want to log back in you'll have to enter both the account username and the password. If you log out from Netflix (or whatever else) the cookie gets deleted. ![]() Now, you may be asking what's the use of password store in the browser. But apparently Netflix uses cookies that are valid for a longer period of time which keeps you logged on unless you delete your browser history - especially cookies. Some web services may use cookies that are valid only for a short period of time or only in the current session (for example Yahoo and Facebook unless you select a Remember me on this computer option). Haven't you seen the same behavior on Google, Facebook, Yahoo, Windows Live and whatever account you may think of? Just like almost all websites that you can log on, it stores a cookie on your PC which among other things, stores an encrypted data representing your password. However, a cookie would still be created to identify your session. Lastly, if you opted to log in through your Facebook account, you wouldn't need a password and so Firefox wouldn't store one. ![]() Firefox stores them in its Profiles folder in the file cookies.sqlite which is a SQLite database file. Regarding your second question, if Firefox didn't 'remember' the password, it isn't stored anywhere. Delete that cookie and Netflix won't remember you. These 'cookies' as they are called generally persist for a short period time until the session is active and then expire. If you did, Firefox stores a small tidbit of information on your computer that uniquely identifies you whenever you visit Netflix. When you logged into Netflix (maybe a while ago), you may have chosen to remember your session. So how are you logged in if Firefox did not store the password for Netflix? It's because they don't know what your password is either. This is why when you click on some variation of the Forgot password link they don't send you your old password but rather ask you to choose a new one. ![]() If they match, they know that you've entered the correct password and you're granted access. They store this hash in their internal database and every time you log into Netflix, the password you supply during the login process is hashed once again using the same scheme and is matched against the copy of the hashed password stored in their database. For instance, here's what my-secure-password looks like after being hashed using MD5: What this does is essentially create a unique fixed-length hexadecimal fingerprint that identifies the string of text that is your password. ![]() What Netflix and every other competent website out there does is hash your password using a one-way hashing scheme ( MD5, SHA-1, SHA-2, etc.). To answer your first question, Netflix doesn't know your password.
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