I assume that you do not use the Primary Password as using biometrics or Windows Hello on desktop is merely 'cosmetic' and doesn't provide real protection like I wrote in that question? *https://support.mozilla.org/en-US/kb/use-primary-password-protect-stored-logins If you use the PP then you can re-lock the logins by canceling a PP prompt. I prefer not to use auto-fill for logins as I do not always want to login if I visit a website, so I use "Use Saved Login/Password" in the right-click context menu.