We know that often times it's happen that you store a password in your computer and when next time you require to type that password another time to use somewhere else.you don't remember it.Instead of asking for a new password you can simply find out your old password in Your browsers.
Just Follow The give below steps for do this.
1. First You click on Firefox Button or tools.
2. Now you go to options.
3. An options window will pop up. In this click on security tab and under this click on “Saved Passwords” button.
4. Find the site name and the username you are looking for using the search box and click on the “Show Passwords” button and you can see the previously stored password.
That's it Now You are Done. :)