This is still unresolved. We pay as a company for a password manager which isn't able to fill basic/digest password prompts by at least one of the major browsers?
Even open source password manager extension are able to do it:https://github.com/kee-org/KeeFox
Maybe you can get some inspiration there?
@lastpass please explain at least why not and when this can be fixed?
This kind of authentication is still used by many admin interfaces and as of http digest auth (same problem as http basic)
there is no "insecurity" reason not to do so.