Download and install/run

FF Password Exporter. ...
   Choose the Firefox user's
profile directory you want to export passwords from.
   If you have set a master password
to protect your Firefox passwords, enter it.
   Click the export button.
   Choose your file format (CSV or JSON),
and save the file to your device.

1. Download and install/run FF Password Exporter. ...

 2. Choose the Firefox user's profile directory you want to export passwords from.
 3.  If you have set a master password to protect your Firefox passwords, enter it.
  4. Click the export button.
  5. Choose your file format (CSV or JSON), and save the file to your device.

https://support.mozilla.org/en-US/kb/usernames-and-passwords-are-not-saved

I don't see either FF or Firefox Password Exporter under Tools > Add-ons or under about:addons. There are other password tools, but not that. And even if I had it, what good would it do? The exported file might have Goodle or might not . . . I'm wondering why Google is not in the list.

Lockwise lets me add it by hand, but I wanted to investigate this first.

https://support.mozilla.org/en-US/kb/usernames-and-passwords-are-not-saved