Quote:Mozilla plans to launch several password manager and password related enhancements in the upcoming Firefox 67 Stable release.

The features, which are already implemented in Firefox Nightly, the cutting edge development version of Firefox, improve password functionality in three main areas.

Firefox's password manager works similarly to the password manager in other browsers. Users may use it to save logins and auto-login into sites using the saved logins. Firefox users can import and export passwords, and sync them across browsers.

Current versions of Firefox lack functionality that other browsers, e.g. Google Chrome, support. Chrome comes with an option to disable automatic sign-ins.

Firefox does not support the option right now in the stable version but will include the option when Firefox 67 is released.

Just open about:preferences#privacy in the browser's address bar and click on the "saved logins" option under Logins & Passwords. You find the new "Autofill logins and passwords" option listed there. It is checked by default; Firefox will fill out logins and passwords automatically just like it did in previous versions.

Full reading: https://www.ghacks.net/2019/02/12/firefox-67-password-manager-improvements/