It usually works well, but sometimes it doesn't fill in fields and I have to copy/paste my password from the application.

Works as intended... most of the time. The only issue I've come across is, sometimes I will have to sign in multiple times in order to actually get into the extension. Otherwise, pretty solid. Autofill works like a charm. Seamless transition between desktop and mobile. Passkeys also work beautifully.

So far I'm having a good experience with the Nord Pass extension aka add on. I haven't had any problems so far. I like that it also will update any information as needed in the vault. I'm happy with it so far.

Perfectible but good enough to keep. It should, by default, offer to clear Firefox's saved password database (or import/merge it).
Too many "false positives" when updating information - something changed in a field, fine, but which one? And why can’t I ignore updates on a given page?
The "new password" prompt is annoying: I have a better generator, but it's impossible to disable this one.
If there’s an option to automatically check "Stay logged in" boxes, it’s nowhere to be found. Not to mention websites that show a login prompt even when you're already logged in...
The handling of shared passwords is pretty poor - for example, professional sites with LDAP-based authentication, all using the same password.
LDAP connections should have their own category, with each site able to allow (depending on the case) login by username, email, or domain\username, always using the same password, of course.
Ideally, it should include an Authenticator feature to enable complete login without requiring a third-party tool: passkeys aren’t universally supported or always reliable.
There should be an option to manage API passwords for certain sites, storing a reusable copy as needed.