At #OpenPrinting we release the fifth beta of the Common Print Dialog Backends 2,x (#CPDB), Manin fix is to make frontends and backends communicate D-Bus-only and not browse any auxiliary files, for sanboxed packaging, like #Snap, #OCI containers, #podman, ... to work.

https://openprinting.github.io/Common-Print-Dialog-Backends-Second-Generation-Fifth-Beta-Release/