After installing the add-on and restart of Firefox I can choose my 1Password Login, but only the username will accept, not the password. I have installed 1Password version 8.10.3 It is working with Chrome and Edge.
We're sorry for the trouble you've experienced with 1Password in the Browser here. What you've described is far from the sort of experience we expect, and we'd love to help you get things running properly if you'd reach out to us at support@1password.com
