I'm sorry if this has been answered before or is trivial. I'm totally new to the Mac world. I used Avast Passwords in Windows for years and it was very reliable. The problem is, although I have installed Avast Passwords and it is integrated with Firefox, nothing ever appears in the fields on the pages. I always have to look them user name and password up in Avast and then paste them manually.
macOS Mojave 10.14.3
Firefox Version 65.0
Avast: I can't figure out the version, but I downloaded and installed it 2/8/2019.