The code for the old password manager (passwordManager.xhtml) has been removed in Firefox 77, so it is no longer possible to switch to the old layout.

You can look at this mozillaZine thread on how to restore support for passwordManager.xhtml:

• FF Password manager Old: http://forums.mozillazine.org/viewtopic.php?f=38&t=3062276

The suggested solution that you have read was only ever meant to be temporary when the new Firefox Lockwise system was first added to Firefox. It was always the plan to remove the legacy logins and password viewer entirely, which is what has happened.

Is there a particular issue that you have with the Firefox Lockwise system or something that you want changed about it?

It's NEVER RECOMMENDED TO RUN OLD VERSIONS OF FIREFOX since that will leave you exposed to a ton of well-documented security and privacy issues that are fixed in the newer versions of Firefox.

Thanks for the response. It does not help me - I want to be able to view ALL my logins and passwords in a single page - NOT one at a time!

Firefox 66 here I come!

Password:Recovery:Restore:Export
https://www.ghacks.net/2018/07/18/how-to-export-firefox-passwords-in-firefox-57/
+++++++++++++++++++++++++++++++++++++++++
http://www.nirsoft.net/utils/passwordfox.html
(Win) PasswordFox v1.58 - Extract the usernames/passwords
stored in Firefox Copyright (c) 2008 - 2017 Nir Sofer

Note: Some anti-virus show false positive.
+++++++++++++++++++++++++++++++++++++++++
Easily export your passwords from Firefox.
https://github.com/kspearrin/ff-password-exporter

Export your passwords from Firefox in a portable CSV or JSON format.
It works on Windows, macOS, and Linux.
+++++++++++++++++++++++++++++++++++++++++
3 Tools to Decrypt and Recover Passwords Saved in Firefox • Raymond CC
https://www.raymond.cc/blog/how-to-find-hidden-passwords-in-firefox/
+++++++++++++++++++++++++++++++++++++++++
https://www.ghacks.net/2018/07/18/how-to-export-firefox-passwords-in-firefox-57/

+++++++++++++++++++++++++++++++++++++++++
https://github.com/kspearrin/ff-password-exporter
+++++++++++++++++++++++++++++++++++++++++
If you don't find a third party script or program you can trust, you can run a script in Firefox's Browser Console to spit out the list in CSV or JSON format. For example:

JSON file: https://support.mozilla.org/questions/1258644

CSV: https://support.mozilla.org/questions/1253828 (copy/paste from console)

chrome://passwordmgr/content/passwordManager.xul

chrome://passwordmgr/content/passwordManager.xhtml