Step 1. Open the Mozilla Firefox web browser.
Step 2. Click on the Firefox menu button 
located in the upper right hand corner.
Step 3. Click on Login and Passwords. The Firefox Lockwise about:login page will open in a new tab.
Step 4. Locate the login from the list on the left side to be updated and click on it to select it.
Step 5. To view the password, click on the 
to view. Select Edit at the top to edit the password.
Step 6. Once the new password has been entered, click the Save Changes button.