Have you ever disabled e10s (multiprocess) on Firefox by adding an environment variable to your system?

If you have, disabling e10s breaks certain functionality in Firefox. In this case, Firefox wouldn't be able to make the privileged process it needs to view your passwords.

Removing the environment variable that's disabling e10s should fix the issue.

Hope this helps.

I've done some research about environmental variables & e10s on the Internet, and I've found out - I give up, to heavy for me...:) I went back to 68.5.0esr. But thank you anyway.

Edit: I'm awake, my mind's fresh, I think, I'll try again... and I found it https://support.mozilla.org/en-US/kb/performance-settings removed the esr, installed 73.0.1 and a surprise, works properly without any changes in settings :) Don't know what happened...