When you save passwords in Firefox, they can be a security loophole, as anyone with access to your computer can view them. In this post I will tell you how you can view and remove saved passwords in Mozilla Firefox. This guide can also be useful for retrieving forgotten passwords from your Firefox browser.
Click on Tools –> Options, in case you are unable to view these options hit ALT to make this menu appear.
After that, Click the Security tab and click on Saved Passwords.
From here, click on Show Passwords to view the passwords with the associated usernames.
This will display the website URL, username and passwords. You can select an account and click Remove or alternatively Remove All (for all saved passwords) to delete the password(s). Unfortunately, many users are not even aware of this section of Firefox, which makes them even more vulnerable to password retrieval by someone else or a malicious application.