In Firefox, adding, editing and removing usernames and passwords is done through the Firefox Lockwise page. This page can be accessed by pressing the Firefox menu button (three lines in the top-right) and selecting Logins and Passwords.

Hope this helps.

See also:

• https://support.mozilla.org/en-US/kb/password-manager-remember-delete-change-and-import

Thanks guys, but I know this is how Firefox itself does it. It's just that Edge and Chrome both offer a technique to simply arrow down to an old one and hit Delete key. I was hoping there was an extension of other option that would enable that on Firefox. So much easier and faster than going to a different panel and re-entering the web address to find all ID's and PW's for it and deleting the old ones.

Is there any possibility of such an extra feature, evidently I have a bunch to do for some reason.

In Firefox you need to use "Shift + Delete" to remove an item in an autocomplete drop-down list, so you can try that.

You can use these steps to remove saved items from an autocomplete drop-down list.

1. click the (empty) input field on the web page to open the drop-down list
2. highlight an entry in the drop-down list with cursor Down key
   do not click the mouse or press the Enter key
3. press Shift+Delete (68+) to delete the highlighted entry