https://www.mozilla.org/en-US/firefox/76.0/releasenotes/ includes a note about the OS authentication feature that should be removed. This feature was disabled post-release.
This paragraph should be removed,
You have been able to access and see your saved passwords under Logins and Passwords easily under the main menu. If your device happens to be shared among your family or roommates, the latest update helps to prevent casual snooping over your shoulder. If you don’t have a master password set up for Firefox, Windows and macOS now requires a login to your operating system account before showing your saved passwords.