When I open the Firefox browser, it asks me for a password and gives two options: Sign In and Cancel. Normally, if I enter the correct password, I can access the browser. If I press Cancel, access should be denied and the browser should close. However, this is not happening. When I press Cancel, the popup window disappears, but anyone can still use the browser, although they cannot access the saved autofill passwords. Could you help address this bug or issue?