Here is simple hacking tutorial to view the saved passwords in Mozilla firefox.
While visiting public internet cafe ,some innocent peoples click the "Remember" while mozilla asking for remembering. This is one of the benefit for us to hack their account in very simple way.
click the "Tools" menu in menu bar.
Select Options
It will open a small window
You can view "saved Passwords" button
Click that button.
It will another small window
There will be list of sites with usernames
Select One site and click the "show Password"
Keep Visiting :)