Adding login information to Firefox Quantum
How to get a new login into Quantum Firefox. Basically, you sync passwords with Waterfox which has the link. I did this in High Sierra & it worked. There was a lot of run-a-round getting all my ducks aligned.
Difficulty #1 Mozilla deleted it historic add-on database.
solution: https://github.com/JustOff/ca-archive/releases
download file
click on this line
Waterfox will put up several prompts asking if you know what your are doing. Say "yes".
This will put up a flower icon on the browser command line.
Click on the flower icon
install Saved Password Editor.
the key and ... icon will appear on the command line. click on the icon.
fill in these files. Do your own thing on Username and Password. I haven't filled in my username as of yet. Yes, host and submit prefix is the same.