DELETING PASSWORDS IN MOZZILLA FIREFOX
You can easily manage the usernames and passwords that Firefox has saved for you.
1. Click the menu button (three horizontal lines) and choose Options.
2. Click the Privacy & Security panel.
3. Click Saved Logins… under Forms & Passwords. The Password Manager will open.
4. To see the passwords you have saved, click Show Passwords. When you close the window, your passwords will be automatically hidden.
5.Use the search box to find a particular website or username. Click the X in the search bar to clear your search and see the full list again.
6.To remove the username and password for a website, select the site's entry from the list and click Remove.
7.To remove all stored usernames and passwords, click Remove All. After confirming this choice, all of your stored usernames and passwords will be deleted.