From Hdwiki
Firefox Saved Passwords
If you have chosen to save your WebCT password in Mozilla Firefox, it will never allow you to log into another WebCT account. Here is how you force Mozilla Firefox to "forget" your password:
- Tools > Options
- Go to the Security tab
- Click on the Saved Passwords button
- Select which website you want Firefox to forget the password of and then hit Close
- Restart Mozilla Firefox and then try going to your WebCT and it will prompt you for your username and password

