Are you selecting “Remember My Password”? Please read this

  want to secure your account? then you should read this article.

Remember Password I:
While login to your account in Mozilla,there will be option named as “remember password ” .  If you selecting that option, soon you may loose your account. (if you are using in internet cafe,certainly you will loose).  Those password can be view by hackers which is stored in cookies(may be plain text or encrypted form).

Remember Password II:
After you click Login button mozilla will pop up with “remember password”,”never to this site”,”not now ” option.  If you are selecting “remember Password” option, certainly you will loose your account. Because when you click that option,mozilla will store the password as plain text.  So it is not big deal to hack your account.  Hackers can see easily your password.

Do you want to know how to see password ? Read How to See Saved Passwords in Mozilla

Don’t think that no one can see your saved passwords in your personal computer.
It is easy to steal your cookies