Do you mean names and passwords in the Password Manager or do you mean that you are no longer logged on to (remembered by) websites after closing and restarting Firefox?

There is a difference between remembering the name and password in the Password Manager and a "remember me" check box on a web page to log you in automatically.
The latter usually involves the creation of a special "remember me" cookie that is stored on your computer and that is send to the server.
If that "remember me" cookie is removed or gets corrupted or is not send to the server then the server won't remember you anymore and you need to sign in once again.

• http://kb.mozillazine.org/Cookies
• http://kb.mozillazine.org/Password_Manager

sorry for the delay. i am asking about the password manager. why in firefox theuser and password are being auto complete and on IE and Chrome it doesn't?

You can add an autocomplete=off attribute to an input field to prevent Firefox from storing the value of that input field.

• https://developer.mozilla.org/en/How_to_Turn_Off_Form_Autocompletion

I haven't used this feature in IE or Chrome. Which behavior do you prefer? Are you trying to block automatic login?

hi

no, i do want IE and Chrome to autocomplete my user and password like FireFox does. i'm not sure why it's not working..