Maintainers for okular-extra-backends are Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: libokular5core10, libokular5core11, libokular5core8, libokular5core9, libokular6core2, okular, okular-data, okular-dev, okular-doc, okular-mobile, qml-module-org-kde-okular, qml6-module-org-kde-okular.
You might like to refer to the okular-extra-backends package page, to the Package Tracking System, or to the source package src:okular's bug page.
If you find a bug not listed here, please report it.