Fingerprint unlock on firefox browser [Linux]

I experience that same problem on my refurbished Lenovo Yoga X1, which has a supported fingerprint reader, under Ubuntu 24 LTS. I was able to integrate the 1Password standalone app with system authentication/fingerprint reader, but the 1Password plugin in the firefow browser reported a "Communication Errror" with the standalone app. The problem is that Ubuntu installs Firefow via snap. You need to install Firefox as standalone from the Mozilla repositories with apt, not snap. There are some detailed instructions under https://askubuntu.com/questions/1516223/how-to-install-firefox-from-official-mozilla-repository-on-ubuntu-24-04 . The process took about 10 min, but then everything worked.