To reproduce the issue:
- Open the DevTools window to see logs in the browser console
- Enter a random email and password
- Submit
- Click "Save" on the Firefox popup asking whether you want to save the entered credentials
- Reload the page
- Firefox should autofill both the email and password fields
- Pressing Submit again will log an empty email (wrong, change event not dispatched) and the autofilled password (correct, change event dispatched)